Of course it's normal. People like what they like. It's perfectly fine.

I would talk to him about it. Don't let him do things to you that you don't like.

Woman like many different things. I've actually heard of this, so yes, it's normal. If you don't like it, I'd talk to her about it.

Talk to him about it. People like doing it anywhere. But tell him why you don't want it and he'll let you down easy.