I was with one that I'm pretty sure wanted me to rape her. I didn't know it at the time, so I didn't get any. But I met another girl online a year or 2 later who told me about her rape fantasies, and I thought back to this chick and realized that must have been what was going on.
Anyway, the chick in question let me stay over at her place and sleep in her bed, and she was completely naked. When we hit the sack, I started trying to get something going by touching her and playing with her pussy. When she got off, she said that I should take care of myself now. I was confuzzled, I was thinking, "Seriously, you invite a guy to sleep naked with you, let him finger bang you and then want him to go jerk off in your bathroom?" We did this 2 or 3 times before we stopped seeing each other. There were other cues that I can't recall right now, but that's probably the point I should have climbed on top and went to town.
But be careful with that shit. There was another girl I was seeing who I thought was the same way. In her case, we had lots of oral, just never any coitus. Then one night we were fooling around and talking about how you should just do things, and how waiting for permission is for sissys. So I was thinking she was just another one of these freaks. But when I climbed on top of her she freaked out and kicked my ass off the bed. Turns out she just had a strange dividing line in her mind between sex and the fooling around that we were doing. Like, we weren't serious since all she was doing was sucking my dick and letting me cum on her.