I think it's more to do with the Chrysalides being a Seer Legacy, and the Exarchs being famously Monkey's Paw assholes about several issues.
Yeah, on second thought that absolutely fits with the Seers.
The test could be stamina (with the difficulty increasing as they get extra freaky - if they fail they still get beats but also damage) or willpower (otherwise they get emotionally attached to their partner and swooned works only with them).
Another idea could be a camgirl that gooned herself into mind control power and technomancy - this also would work really well as a Chrysalides
I think the main trick is figuring out how this makes sense in setting. Like, someone learning because they either did something really well (exceptional success) or fucked up really bad (dramatic failure) makes a fair amount of sense. Things just clicked, or you learned from your mistakes. Accomplishing an aspiration or the end of a session are obviously not as fitting, but they're kind of an RPG staple. So how does fucking around with conditions help someone learn?
The most obvious analogy is weight training. You do exercise with weights on, you get more out of the exercise, only here the "training weights" can just as easily apply to the mind as the body. That doesn't really link it directly to sex/ecstasy, but that's fine, because a Mage ending up doing that in pursuit of their obsessions is perfectly plausible.
So to sketch things out, a small town prostitute awakens. The exact nature isn't super important, though ideally it leaves her wary of the supernatural and inclined to keep her head down - an encounter with a Vampire or Werewolf perhaps. Regardless, she awakens a Thrysus, can suddenly see that everything is alive, but she ends up with something of an obsession for tantric magic. She's wasted too much time fucking strangers for money. There
has to be something there that makes it all worthwhile, and she is going to find it. And she does! Talking with a spirit of a brothel or something, she figures out that some mindfuckery on herself can help her grow her powers and expand her mind.
Except there is a cost. Altering a sapient's nature long term is a medium Act of Hubris, and she burns through a fair amount of Wisdom doing this constantly, perhaps bottoming out at Wisdom 3 and finally realizing things have gone wrong, and gaining a new obsession for seeking wisdom. But at the same time, she's seen this technique does work. Her power's grown in leaps and bounds, and she doesn't really want to stop. She quite likes the idea of sex as a path to power, after all.
So she starts to build a Legacy. She's Gnosis 3 at this point, so she can, and the fun thing about Legacy attainments is that they're never an Act of hubris, just like they never cause paradox. Maybe there's some other benefits as well - if one wanted to make the Perfected Adepts really salty, say the attainment can create both Arcane and standard XP, because fucking ones way to five dots in stamina is kind of a funny. But regardless of the mechanical specifics, she figures out some sort of framework, and tries to fill it with a philosophy that...well, probably depends exactly on the exact nature of the Legacy. Mind/Life is probably more focused on perfecting oneself mind and body via all the ritualistic sex, while Prime/Life would be more some sort of "Sex is truth" thing, though admittedly, I'm not entirely sure how that would work.
Regardless of the specifics, she probably ends up starting a sex cult, which could go really well, or really badly, depending on who ends up finding her.
