Individual words don't bother me much. Though I have to admit the clinical ones are not sexy. I once had this gf for a short while who kept using vagina instead of pussy, as in " I want your dick inside my vagina." Hard not to laugh when she put it that way. Now, words I hate to hear.....
Wait, you want to put that WHERE?
What kind of a girl do you think I am? (Normally my cue to go, "not the one I am seeing tomorrow".)
And my all time worst......
I am not putting that in MY mouth!!! (Again, my cue to go, "So sorry, have a nice life".)