Cannabis makes me quite frisky, it also makes me much more likely to put on the moves...ladies can't resist my filthy ropehead charms.
Morphine, suprisingly, never fails to get me incredibly horny, after the initial rush/pin-pricks but before I slide into the proper nod-zone all I want to do is fuck. Morphine + Endorphins = bliss. Can be hard to actually cum though, but a lot of the time I don't even care.
2C-B, I was sceptical as fuck about all this 'erotic' crap that shulgin and others talked about when describing this chemical. I mean, I could understand if it had moderate amphetamine-like effects where you could go for ages but without the amp dick, but no...it was something else entirely, it just made sex so...sexy...that it becomes impossible not to get really into your partner/the situation and have some really fucking great sex.
Here's an odd one- an ex of mine took zopiclone regularly for insomnia, but she'd play with it (as we all do with sleeping pills) and take the pill a bit earlier and stay up and enjoy the relaxation/weird shit for a while before hitting the sack. Zopiclone made her really fucking horny, I don't like sleeping with people on benzos (can never be sure if they're remembering any of this) but we were living together and she was like a fucking animal, she'd take 2-4 pills and 40 minutes later she'd have me pinned to a chair with her on top of me. And yes, a great deal of the time she had no memory and would be quite embarassed by her "take off yer fucking pants cunt" behaviour.