AIO bf bites me but acts like a baby when I want to bite him

Biting turns me on so whenever I’m in the mood to bite my bf he squirms like a baby and moves away. He doesn’t let me approach him. Yet, when he’s in the mood he bites me because it turns him too and I take it like a champ so basically I let him do whatever he wants.

I know I might be overreacting, however it feels unfair.