Ashamed Secret

I've been working as a personal trainer for five years now and everything was going smoothly until I started playing out these fantasy scenarios with my partner where I'm the dominant one, kind of like being their coach but in a more intimate way. It feels weird talking about it even here because I don't want to get labeled or judged. We do things that aren't typical gym stuff at all, I feel guilty for finding this so exciting. Is there something wrong with me? Do others find similar outlets?