Different strokes (swoosh smack! OWW omg thanku sir) for different folks.

As with all things the degree of excitement is going to vary from individual to individual.

I am not a pain slut per say, but i have indeed achieved orgasm before from a properly applied spanking to my anus and cunt. I have also just came before due to the situation i was in while bound etc without outside stimulation (before i was conditioned to orgasm on command).

I am sure this effect is unique to every individual, yet i am certian i am not the only one thats had an orgasm from thier fettish before eaither.