Aphrodisiac

What Weiss didn't know, was that the dust she had made was incredibly special. If consumed (or allowed to interact with Aura), it would make anyone exposed incredibly horny, depending on the dosage.

If a huntsman or huntress was unfortunate enough to be exposed to this, they'll be almost painfully horny until their desire is finally quenched or the dose wears off. Fortunately, that desire can be quenched in the obvious way: Sex.

The victim giving themselves an orgasm is not enough. Another person has to be the one to bring them to orgasm. Even then, it will still take multiple times until the victim can finally calm down.

That just raises two questions, who finds the dust and who is willing to give them a hand?