In a New Orleans laboratory, a man sits with a small control box wired to electrodes deep in his brain. When he presses the button, a region called the septal area is stimulated, and he feels intense pleasure. He presses it again. And again. Over about three hours he presses it some fifteen hundred times, and when the session ends he protests having to stop.1
The patient was known in the records as B-19, and the man running the experiment was the psychiatrist Robert Heath. What Heath was attempting with that button is one of the most disturbing episodes in the whole book — an effort to use direct electrical pleasure to change not just what a man did but who he desired to be. And what happened, and what conspicuously didn't happen, and what Heath himself refused to do with his discovery, together make B-19's case a dark, precise test of the book's deepest question: can you reach a person's identity by wiring their pleasure?
Heath was a serious researcher who, beginning in the 1950s, pioneered deep-brain stimulation in human patients — implanting electrodes and stimulating regions to study and treat severe psychiatric conditions. He was especially interested in the brain's pleasure and reward systems, the human counterpart to what James Olds had found in his self-stimulating rats. Where Olds had a rat pressing a lever thousands of times an hour, Heath had human patients with buttons wired to their own septal regions.2
Heath's work sat on a genuine scientific frontier and a genuine ethical precipice at once. The reward circuitry he was mapping is real, and deep-brain stimulation would eventually become a legitimate therapy. But the power he'd found — direct access to a person's pleasure, on a button — was exactly the kind of power the coercion engineers of the previous chapters had only dreamed of, and Heath was holding it in his hand in a clinical setting where the guardrails were his own judgment.
Two patients anchor the story. B-7, who suffered from narcolepsy, used self-stimulation to stay awake — pressing the pleasure button not only for the pleasure but to fend off sleep, a use that already showed how a wired reward could organize a person's behavior around the button. And B-19, a young man Heath treated in part because he was homosexual — which in that era was pathologized as a disorder to be "cured" — became the subject of Heath's most notorious experiment: an attempt to use septal stimulation to redirect his sexual orientation.3
That B-19 was being "treated" for homosexuality at all is the first horror, and it dates the episode precisely to an era when the psychiatric profession classified a sexual orientation as an illness. Heath's experiment took that classification as license to attempt a rewiring, and the tool he reached for was the pleasure button.
The experiment ran on a brutally simple logic of reward conditioning. Give B-19 access to self-stimulation of his pleasure center, pair that pleasure with heterosexual stimuli — pornography, and reportedly an encounter arranged with a female sex worker — and try to condition his arousal and orientation toward women by linking them to the electrode's reward. The fifteen-hundred-presses session was part of this: saturate the man with electrical pleasure in a heterosexual context and see if his desires reorganized around it.4
Heath reported the experiment as some kind of success — B-19 did perform heterosexually in the stimulated context, and Heath took this as evidence of a redirected orientation. But read what actually happened rather than Heath's gloss. Under direct stimulation of his pleasure center, in a rewarded context, B-19 exhibited the behavior Heath wanted. The question that decides everything is whether that behavior meant B-19 had been converted — whether he now, in himself, desired differently — or whether he had merely done, under the overwhelming reward of the electrode, what the setup rewarded him for doing.
There is every reason to think the answer is the same answer the whole book keeps giving. B-19's behavior under electrical pleasure-stimulation tells you almost nothing about B-19's actual orientation, for exactly the reason Delgado's stopped bull told you nothing about the bull's disposition. The electrode reached his behavior — it drove him to act in the rewarded way while the reward was flowing — and there is no good evidence it reached his identity, the actual structure of who he desired. Remove the electrode's reward, and the reasons to think the underlying orientation persisted are far stronger than the reasons to think a few sessions of button-pressing had rewritten it.5
So B-19 is Delgado's bull with the stakes raised from aggression to identity, and the result is the same. Even direct electrical stimulation of the pleasure center — arguably the most powerful behavioral lever the brain offers — produced compliant behavior in the moment and gives no real evidence of durable conversion. Heath had the coercion engineer's ultimate reward tool, pointed at the most intimate part of a person's identity, and what he demonstrably achieved was behavior-under-stimulation, not a changed man. The pleasure electrode, like every other technique in the book, reached what a person does and stopped at what a person is. That this was attempted on a man's sexuality, under the cover of "treatment," makes it one of the book's ugliest illustrations of the compliance-conversion gap — and one of its clearest, because the claim of conversion was made and the evidence for it dissolves on inspection.
Then comes the turn that keeps Heath from being simply a villain, and it's the moral hinge of the whole page. Given what Heath could do — direct access to pleasure and, potentially, pain in the human brain — the intelligence agencies of the MKUltra era were exactly the customers you'd expect to come calling. And when the coercion apparatus took interest, Heath refused. His recorded reaction is blunt: "Disgusting. If I had wanted to be a spy, I would have been a spy. I wanted to be a doctor and practice medicine."6
Hold that against the rest of the book. The MKUltra chapters are full of doctors and scientists who did not refuse — who took the money, ran the surreptitious dosing, proposed the brain-damaging procedures, and told themselves stories about necessity. Heath, whose experiment on B-19 was itself an ethical catastrophe by any present standard, nonetheless drew a line the CIA's own recruits didn't: he would not turn his medicine into a weapon for the state. The line is real and it matters, and it complicates any simple reading of him. The same man capable of the B-19 experiment was also capable of telling the intelligence services that what they wanted was disgusting and not what he became a doctor to do. Heath is the reminder that the individual's refusal is always available, even to someone whose own hands are far from clean — that the line between medicine and coercion was, in the end, drawn or not drawn by each person who held the tool.
Suppose you had Heath's pleasure electrode and wanted to convert someone — change not what they do but who they desire to be. Watch the attempt run to its limit.
Wire the reward. Implant an electrode in the pleasure center and give the subject, or yourself, a button. The pleasure is intense, direct, and overpowering — powerful enough that a subject will press hundreds or thousands of times, forgoing food, sleep, everything.
Pair the reward with the target. Present the stimuli you want the subject to desire — a new object of attraction, a new allegiance, a new belief — while the pleasure flows, hoping to condition their desire toward whatever the reward accompanies. Saturate them: fifteen hundred presses in a context engineered around your goal.
Observe the behavior. Under stimulation, the subject performs — acts attracted, acts converted, does what the reward rewards. It looks like success, and you may, like Heath, report it as success.
Now cut the current and check the self. Here the attempt fails, as every attempt in the book fails at this step: the behavior under reward gives no evidence the subject's actual desires or identity changed. You conditioned what they did while the electrode ran; you did not convert who they are. What tells you you've hit the wall is that your "conversion" is only ever visible while the reward is active — the moment you stop stimulating, you have no man remade, only a man who did, under overwhelming reward, what you rewarded him to do.
The technology did not disappear; it grew up. Deep-brain stimulation is today a legitimate, valuable therapy — for Parkinson's disease, for severe depression, for other conditions, with electrodes implanted and reward or regulatory circuits modulated to relieve real suffering. Heath's monstrous frontier became, in refined and ethically governed form, ordinary neurology.7
And that maturation reopens the book's oldest question in a new key. If we can now routinely stimulate pleasure and modulate mood by electrode, and if the technology keeps advancing, would a latter-day coercion engineer be able to use pleasure and pain stimulation to do what Heath could not — reach past behavior into belief and identity? The honest state of the evidence is that nothing so far has crossed that wall; Heath's B-19, like Delgado's bull, produced behavior and not conversion. But the question hangs over the chapter precisely because the technology is real, improving, and now medically normalized, so the tool is no longer exotic. The book leaves it open: the pleasure electrode has never yet converted a self, and no one can promise a sufficiently advanced version never will. Heath's disgusted refusal answered the ethics for one man; it did not answer whether the wall he ran into is permanent.
The evidence is the documented Heath record — the septal self-stimulation work, B-7's use of it against narcolepsy, the B-19 "conversion" experiment with its fifteen-hundred-press session and its claimed but unpersuasive success, Heath's refusal of the intelligence services, and DBS's later legitimate development.
The tension the page must hold: Heath is neither hero nor simple villain, and the page must not resolve him into either. His B-19 experiment was an ethical atrocity — coercive "treatment" of a non-illness, attempting to rewire a man's sexuality with a pleasure button. And his refusal of the CIA was a genuine act of conscience the era's more celebrated researchers failed to match. The unresolved tension is that the same judgment which let him refuse the state did not stop him from the B-19 experiment — that a person's ethical lines can be real and firmly held and still fall in places that look, from another vantage, incoherent. The honest reading holds both without averaging them: Heath drew a line the CIA's recruits didn't, and drew it while standing somewhere no present ethics would defend, and that combination — real conscience, catastrophic blind spot — is more instructive than either a hero or a monster would be, because it's the actual shape of how people who hold dangerous tools actually behave.
Heath's B-19 is the human sequel to Olds's self-stimulating rat and Delgado's bull — the pleasure electrode carried from the animal to the person, and to the most intimate target imaginable, identity itself. And the result converges with the book's spine exactly as the bull did: behavior under stimulation, no evidence of conversion.
His refusal of the CIA sets him against the MKUltra cast — Gottlieb, White, and the academics who took the money — as the doctor who said no, a live counter-case to the book's institutional-complicity theme: complicity was a choice, and here is a man who chose the other way.
To behavioral-mechanics — Intermittent Reinforcement and Control Dynamics. Reinforcement — rewarding a behavior to increase it — is the engine of behavioral conditioning, and the pleasure electrode is reinforcement stripped to its purest possible form: the reward delivered directly to the brain's pleasure center, bypassing every intermediary. The insight the pairing produces: Heath's B-19 experiment is the maximal test of what reinforcement can do, and it reveals reinforcement's ceiling. Ordinary reinforcement shapes behavior through a chain — do the thing, get the reward, the reward strengthens the behavior — and its power is always somewhat limited by how much the subject values the reward. Heath removed that limit: he wired the reward directly to the pleasure center, giving reinforcement the most powerful possible reinforcer, one so strong a subject presses it fifteen hundred times. And even that — reinforcement at maximum strength, reward as direct as physically possible — produced only rewarded behavior, not converted desire. This tells the reinforcement concept its own boundary: reinforcement can drive behavior with unlimited force and still not reach identity, because reinforcement shapes what is done for the reward, not what is wanted in the reward's absence. B-19 pressed for the pleasure and performed for the pleasure; remove the pleasure and the performance's grip on his actual orientation vanishes, because it was always the reward's grip, not a change in him. The pleasure electrode is reinforcement's proof-of-limit: the strongest reinforcer imaginable still buys behavior, never belief.
To eastern-spirituality — Inner vs Outer Intoxication. The contemplative traditions draw a sharp line between outer intoxication — pleasure or ecstasy induced from outside, by a substance or a stimulus — and inner intoxication, a bliss that arises from realization, from the nature of consciousness itself. The pleasure electrode is outer intoxication in its most literal, most engineered form: bliss delivered by a wire, from outside, on a button. The insight neither domain gives alone: the traditions predict exactly Heath's failure. Outer intoxication, however intense, is transient and non-transformative — it produces a state while the cause is present and leaves the person unchanged when it lifts, because it never touched the self, only stimulated it from outside. Inner realization transforms because it is a change in the knower, not a state administered to them. B-19's electrode gave outer intoxication at maximum intensity and, precisely as the traditions would predict, changed his behavior in the moment and transformed nothing, because outer stimulation — even directly into the pleasure center — reaches the experience and not the experiencer. So the eastern distinction explains why the pleasure electrode can't convert: it is categorically outer, and only inner change transforms identity. Heath was trying to produce a transformation of the self (a new orientation) with a tool that can only ever administer an outer state — attempting, in the traditions' terms, to reach realization with a narcotic, which cannot be done however potent the narcotic. The pleasure button and the drug and the ecstatic stimulus all share this ceiling: outer intoxication is a state, not a transformation, and the self it's administered to remains, when it fades, exactly itself.
Sharpest implication: B-19 pressed a button wired to his own pleasure center fifteen hundred times in three hours, and Heath used that electrical reward — paired with pornography and an arranged encounter — to try to convert the man's sexual orientation. Heath claimed success; the evidence for it dissolves on inspection. Like Delgado's stopped bull, B-19's rewarded behavior tells you what he did under stimulation and nothing about who he actually desired, because the electrode reached his behavior and there is no real evidence it reached his identity. This is the compliance-conversion gap at its most intimate and ugliest: the pleasure electrode, arguably the most powerful behavioral lever the brain offers, pointed at the core of a man's selfhood, and it bought behavior-under-reward, not a changed man — reinforcement at maximum strength still buying only what is done for the reward, never what is wanted without it. The traditions name why: the electrode is outer intoxication, a state administered from outside that leaves the experiencer untouched when it fades, and you cannot reach a transformation of the self with a tool that can only ever produce a state. And Heath, whose B-19 experiment no present ethics would defend, still told the intelligence services their interest was "disgusting" — the doctor who drew the line the MKUltra recruits didn't, proving the refusal was always available, even to hands that were far from clean.
Generative questions: