Rough? kinky? Difference?

Recently me and my boyfriend have been having rougher sex. It’s normally just spanking, choking, dirty talk, the occasional toy. Easy stuff I guess. But recently he asked if he could slap me, I said yes, and now I’m really into it. It’s not a extreme hit but he’ll get really assertive and slap me. Is pain a kink? Not major pain. More like mild, I don’t think spanking, choking, or slapping is too extreme no?

Just wanna make sure I’m not the only one who’s into it 😂