@amir yeah I feel you on this one. my impression is that it's a good helping of both. young hot horny kids always want to do this to some degree, but they're rightly shamed by the culture which keeps them from doing it too much. now that the correcting force has weakened there is less holding them back from it.
the main problem with what she wants is that this hurts people. intimacy builds emotional bonds, entanglements, and then when the partner disappears its like part of you is gone.