I used to have tops cover up, but it was only ever out of fear of STDs, for as long as I remember having sexual urges at all I'd wanted to feel used, and fantasising about taking strangers' loads was a very natural part of that. There wasn't a single incident that pushed me over the line, I just gave in bit by bit, swallowing to begin with, then not mentioning condoms and leaving it up to whoever I was with to decide (and to begin with going through all the anxiety after a bare session), and eventually I felt like since I was ignoring safety from time to time anyway, and you never know which fuck might be the one to leave more than a load of cum in me, I may as well just get the most I can out of it, stopped loitering around the perimeter of the dark room at the sauna/club I go to, and got down on hands and knees in there instead. Looking back it just seems inevitable.