Secret Fantasies

I’m a first-year law student and in a good relationship. Lately, I’ve had these fantasies about my professor, him as the dominant one, me being submissive, exploring power dynamics in ways that push boundaries we don't cross at home. It’s all inside my head, no real plans to act on it, but I’m still confused by these thoughts and feelings. I try not to think too much about them around him or in class, keeping it contained to private moments. But sometimes I worry what this says about me and wonder if there's something wrong with being attracted to a mentor in this way.