Had a college instructor do that to us. Went from Mr. to Mrs. over the summer. Actually a fantastic instructor and very nice person. Outside of the jokes and comments behind his, now her, back, everyone was pretty much OK with it. The sad thing was that her (still sounds weird to say that) health was a lot worse after the operation. Some hormone complications I think. The only other kind of funny thing was that he was completely bald before becoming a she and the wigs never quite sat correctly.