Fisting, Pegging, Sounding... oh wait these are hobbies.Gaming, Cycling, Hiking, Reading, Watching movies... the usual
Turn ons:
Medical toys like urethral sounds and speculum. Getting my ass opened up slowly by a cold, hard, metallic object gets my cock dripping. That and the feeling when someone's wrist slides right in.
Turn offs:
Sexually, not much. Personally, closed-minded people