This question brings back memories... One of the first Playboy magazines I ever snuck out of my dad's room had several photos from a sequence in "Myra Breckenridge" where Raquel Welch strapped a shirtless guy to an exam table: his belly at the table's edge and his feet on the floor. Once he was helpless to move, she then stripped down his pants, leaving him completely naked, and examined and stroked his bare buttocks, laughing at his humiliation. Raquel then proceeded to strap on a dildo and fucked him.
I was a kid at the time, and seeing those photos was my first exposure to the roles of openly expressed stripping-based humiliation and helplessness in some approaches to sex. It fascinated me.
I've often fantasized about being in a similar situation. In my fantasy, a female doctor gives me no choice about being immobilized, then strips off my clothes (obviously enjoying the view, and my embarrassment), then performs a digital rectal exam and a penis exam that involves rolling and flexing, followed by stroking my cock. In part because I once had an exam of my scrotum conducted at a skin care clinic with a young female assistant helping to inspect me, my fantasy of being in a forced exam also involves one or more onlookers.
By the way, I wrote "openly expressed" above, because I had earlier experiences with a strange nurse who liked to pull down my pants all the way for shots, and who left my pants that way (with everything exposed both in front and behind) for inexplicably long periods before finally telling me I could pull my pants up. The nurse never openly teased me or laughed, but she pretty obviously enjoyed stripping down my pants and looking me over. (I've posted about this elsewhere on Zity.) Those experiences (it happened several times) almost certainly have something to do with this fantasy, too.