Biting/scratching turn you on??

i thought this was never gonna happen to me but even since my first girlfriend, she started to bite me , and I could see how she was turned on but I wasn't 100% into it cause I was the one in pain .and to follow down the road my second girlfriend seems to be into it lol.does biting turn you on?.i give bites once in awhile.once my second girlfriend was scratching the shit out of my back, wen I was on top of her.that normal?
Biting/scratching turn you on??
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