Here is one of the most physically startling techniques in the whole tradition, and White names it plainly: vajrolī mudrā is "urethral suction," or, "more prosaically, the fountain-pen technique."1 The male practitioner, having ejaculated into his partner, draws his own semen back up into his body — and with it, draws back a quantity of her sexual essence, now mingled with his.1 He spends, and then he un-spends, reclaiming his seed enriched by hers.
It sounds like a circus trick. But the logic is the deep logic of the whole tradition. Semen lost is life lost (King Moon, the seven cookings). Vajrolī is the technique that lets the practitioner have the sexual act and refuse the loss — and, more than that, come out richer, having absorbed the female fluid that he then refines into nectar.1 It's the practical solution to the tradition's central anxiety: how to handle sexual fluids without being drained by them.
Vajrolī mudrā — urethral suction, by which the male practitioner withdraws his ejaculated semen back into himself, drawing the female essence with it.1 The components:
White notes women may do the same — retain the man's seed to catalyze their own transformations — but adds that from the Kaula viewpoint this is "redundant," because women already possess the nectar; it's the men who must tap into the female to get what they lack.4
Why suck the fluid back? Because the tradition's whole problem is that the sexual act drains the precious fluid, yet the female fluid is exactly what the male needs to complete his transformation. Vajrolī solves both at once: the man gets the female essence (which he lacks) without losing his own seed (which he can't afford to lose). He has the act, refuses the loss, and absorbs the missing ingredient.
The deep premise is striking: women naturally have what men have to work for. The lineage-nectar, the purest substance in the body, is native to women — they're "embodiments of the Goddess," and the nectar is perpetuated "through their wombs."5 Women are "naturally endowed with a greater abundance of vital breath" than men, so raising the kuṇḍalinī is "easier, even natural, for them."6 So the entire male practice is, in a sense, an attempt to acquire by technique what women have by nature. Vajrolī is the pump by which the male draws the female's natural nectar into his own body to compensate for not having been born with it.
And it explains the "two mouths" image: the nectar passes "from mouth to mouth" — the sexual organs of the partners — in "an endlessly renewed exchange."7 The female "chief mouth" gives; the male mouth receives and returns. In the fully developed Kaula view, the pure substance "originally resides" in the woman, is transmitted to the man, and is returned to her, cycling between the two "mouths."7 Vajrolī is the male's end of that exchange — the suction that lets him receive. (Note the same anxiety from King Moon: the man is the one who loses, the woman the one who drains — but vajrolī flips it, letting the man take from her instead.)
This page is the practical technique of the sexual-fluid (bindu) leg of the three-practice signature. It's how the body-version of "as in metal, so in the body" is performed — and it parallels the alchemist's female laboratory assistant (mercury "fixed" by her blood). And it carries the gender-structure of the whole tradition: the female as the natural source of the nectar.
The most revealing move is what happens to vajrolī over time: it gets internalized. White notes that "this practice becomes internalized in certain hathayogic sources, in which one internally drinks the 'brilliant white-red' nectar."8 The external act — two partners, two mouths, real fluids exchanged — collapses into a single body, where the practitioner "drinks" an internal white-red nectar (white = semen, red = the female blood) all by himself.
Watch the arc. The early Kaula practice needs a real female partner, because she has the nectar the male lacks; vajrolī is how he draws it from her.7 Then the later haṭha-yoga version makes the practitioner androgynous — he contains both the male (white, semen) and female (red, blood) principles inside himself, and the "exchange" happens internally.8 He no longer needs a partner; he is both mouths.
This is the same internalization that runs through the whole tradition (the alchemy-turned-inward move): the messy external practice (real sex, real fluids) gets pulled inside and made solitary. The case shows why the internalization happened here: if the goal is to refuse loss and acquire the female essence, the cleanest solution is to stop needing a partner at all — to become internally androgynous, containing both fluids, drinking your own white-red nectar. Vajrolī begins as a technique requiring a woman and ends as a technique requiring no one — the male having fully absorbed the female into his own subtle body. The "two mouths" become one body's two principles.
You're reading a tantric sexual practice and want to understand its logic, past the startling physical detail. Ask who has the nectar.
In this tradition, the answer is: the woman has it naturally; the man must acquire it. So read the practice as a transfer of the female's natural nectar to the male — vajrolī is the pump, the "two mouths" the channel. Then watch for the internalization: later versions make the man androgynous, containing both fluids, so he drinks his own white-red nectar without a partner. Tracking who has the nectar (her, by nature) and where the practice is heading (toward the man having it too, eventually by himself) decodes the whole structure — and reveals the gender-logic underneath: the female as the original source, the male as the one who must extract or internalize what she was born with.
The failure is reading vajrolī as merely a sexual curiosity or feat — a startling physical trick — and missing that it's the practical solution to the tradition's central fluid-anxiety (have the act, refuse the loss, gain the female essence). You spot it when an account dwells on the physical mechanics and ignores the logic of fluid-economy and the female-as-source premise.
The opposite failure is reading it as purely symbolic — "the union of male and female principles." But the early practice is concretely physical (real suction, real fluids), and only later internalizes into the symbolic androgyne. When a reading either reduces vajrolī to a feat or floats it straight into symbolism, it misses the arc — from a concrete technique requiring a woman to an internal practice requiring no one — and the gender-structure that arc reveals.
The evidence is the technique's description (urethral suction, drawing back semen + female essence), the premise that the nectar is naturally female, the "two mouths" exchange, the yoginībhu product, and the documented internalization into solitary white-red nectar-drinking.1278
The tension — and it's a serious one — is the gender-structure. The tradition holds that women naturally possess the purest substance and greater vital breath, that liberation is "easier, even natural" for them.6 And yet the practice is built for the male practitioner to extract that substance from her, and ends by making him internally androgynous so he no longer needs her. So women are simultaneously elevated (they have the nectar by nature) and instrumentalized (they're the source the male taps and then internalizes past). White reports this; it's a genuine tension in the tradition between honoring the female and using her.
An open question: if women have the nectar naturally and liberation comes easier to them, why is the entire elaborate apparatus built for men? The texts describe the female version as "redundant."4 Is that because the tradition's authors and practitioners were overwhelmingly male (White notes the perspective of all the texts is the male practitioner's), so the "problem to solve" was always male lack — making the whole system a solution to a deficiency that only men have? That reading would make the tradition's elevation of women a backhanded one: praising what they have precisely in order to take it.
White draws this from the haṭha-yogic texts (the technique), the Kaula sources (the female-as-nectar-source doctrine), and the internalization passages, and reads them as one arc with a gender-structure. The yoga texts give him the suction technique; the Kaula texts give him "women naturally have the nectar"; the later sources give the internalized androgyne. White's move is to lay these out as a progression — from extracting the female's natural nectar to internalizing it past needing her.
The strength is that the texts genuinely say women have the nectar naturally and build the practice for male extraction — so the tension isn't White's invention. White flags that "the perspective of all Hindu tantric texts of which I am aware is that of the male practitioner," which frames the whole apparatus as male-authored solving of male lack. His reading of the arc (extract → internalize) is well-supported by the documented move to solitary white-red nectar-drinking.
Plain version: a practice can both honor a group as naturally possessing something precious and build an elaborate system to extract that something from them — and the two attitudes can live in one tradition without it noticing the contradiction.
The sharpest version. This tradition says women are born with the purest substance in the human body, that liberation comes more naturally to them — and then it builds its entire elaborate practice to let men extract that substance from women and, eventually, internalize it so completely that the woman is no longer needed at all. Take that seriously and it's a hard look at how praise and use intertwine. The tradition's reverence for the female isn't separate from its instrumentalizing of her; the reverence is the rationale for the extraction — she has it, so I must get it from her. And the endpoint is telling: the male doesn't share in the female's natural gift, he absorbs it, becoming internally androgynous and solitary, the partner dissolved into his own subtle body. What looks like honoring the feminine turns out, followed to its end, to be a program for not needing the feminine at all.
Questions worth chasing: