Ah, thanks. An embarassing story with a moral at the end.It didn't hurt, though- after I got it off and the panic subsided, it was extremely pleasurable! Enough that I went out and bought one made just for that purpose, and it's now my favorite toy.
The snakebite kits that the others suggested are good, too. They don't have a super intense suction, and can easily come off even with maximum puffiness. Happy experimenting!
-Phan