It all boils down to men feeling entitled to decide when and how women should have sex, doesn't it. If we don't want to, we're prudes and teases. If we want to, we are sluts.
I can't help being reminded of how Whedon used Buffy's sex life in the negative sense.
Angel loses his soul after they have sex? Buffy should have stayed a virgin, all the death and destruction is on her! Even though Giles (bless him) told her it wasn't true, Xander was more than happy to throw it in her face and make it clear she was too passionate and hormonal to be trusted where Angel was concerned.
Gets wooed and screwed by Parker? Buffy should have been smarter! She should have known he was a dog! She's a needy pathetic idiot for feeling so hurt!
Turns away from Rikey in her sleep post coitus? Buffy is a terrible girlfriend to a nice normal boy! How dare she not make Riley feel needed and not want to cuddle with him every second? No wonder he has to fool around with vampires!
Has sex with Spike? Oh Buffy is just a trainwreck!
Fuck you, Whedon.