When Bucky is being broken into the Winter Soldier, but still retains some of his memories and personality, after being tortured and starved, he finally just becomes exhausted of fighting and hurting, and agrees to be good for a medical examination that will lead into proper Winter Soldier training. The Hydra doctors, of course, take this and run with it into the trashiest medical exam they can manage.

Things that would be awesome:
++It starts out nicely enough: he's stripped, which is awkward, but then they clean him with soft clothes all over, and that feels shockingly good.
++As things start getting trashier, Bucky trying desperately to retain the sense of calm and relaxation he got from being washed
++He manages to convince himself that it's still just a routine medical exam even when the speculums come out, but the sounding rods and nipple clamps are where he really starts freaking out
+++++The doctors keeping up the charade of Totally Normal Doctor Visit even after the speculums and sounding rods and nipple clamps come out.