We know how youngsters are so impressionable and girls, in particular, like to please their boyfriends
Exactly. Have these people never met teenage girls before? They will "enthusiastically consent" to be the cool girl and then be devastated when their boyfriend tells all his mates and moves on to someone else. A great way to rid young girls of any last shreds of self esteem they might have.
Sometimes I've wondered about starting my own public toilet stickering campaign with slogans like "casual sex is designed for men", "if you're not having an orgasm then why are you doing it" and "that wanker doesn't deserve a naked picture of you".