Yes it’s totally normal. People have all sorts of fantasies - there’s nothing wrong with any fantasies, and when it comes to acting them out I am of the opinion that anything goes, so long as it’s worth consenting adults. I had an ex who was into being dominated, and I found that I really enjoyed playing those games with her. Within the context of a good relationship it can be loads of fun. And it was safe, we trusted each other and she knew she could stop play anytime if she felt uncomfortable.