Cramps after anal sex?

Emmaline • If I could give you one thing in life, it would be the ability to see yourself through my eyes; and then you would know how truly special you are. ☺️

So my partner and I have anal sex a lot, and almost every time I get these cramps afterwards and they’re awful. Is there something we’re doing wrong? Is he pushing air inside of me when he fucks me? Thankful for any answers 💕