Yes I would say I masturbate almost always (95%+) of the time when I wear a diaper.
About an hour ago when I put on a new BetterDry, I decided to just lay down and relax a bit after I had dinner. I was feeling nice and padded in a new dry diaper, and i just felt the urge to turn over on my stomach and hump my bed. I did and picked up the pace until i had an orgams in my diaper!
Sometimes after a few wettings, I like the feeling of rubbing my erection against the nice warm mushy diaper. Feels good and is a great way to unwind before bed ?
So yeah, to answer your question, I do enjoy pleasuring myself in a diaper almost daily!