Weed makes me horny, but when I've had sex on it, it had a tendency to make things turn kind of weird. Like I would stop seeing the girl I was with, as a girl in the way my visual mind is used to understanding what a female is. And I'd just start to get so removed from the experience, until all I felt like I was seeing was two fleshy bodies, rocking back and forth, secreting, and passing juices between each other. Total buzz kill.