Hmm, one pain that I particularly enjoy for its erotic qualities, is hot wax dripping and covering my nipples and clit, the first few times it causes you to squirm and cry out in pain but eventually the warmth and layers of wax make for a very intriguing experience.

Safety pins through my breasts is definitely a kind of pain I relish, it sends me into subspace quite quickly, and the old favorite, belt across the ass, that one needs no explaining!