Jason knows his thighs are thick as hell ever since the Lazarus Pit cured his childhood malnutrition and he put on fat and muscle as he was able to grow up to his full potential. It makes finding pants that fit a bitch and a half. So, when he feels like making himself feel nice he wears thigh highs. Of course that's right when Dick and Tim have to drop by.

Kon is in desperate need of a bit of relaxation. Maybe his method of choice is a little unconventional, but hey, getting fucked until even his Kryptonian biology is exhausted is a harmless way to get there.