Is it normal that i fantasize only about scientists?

So, I used to be kind of sexually confused till now because I'm a female who used to only fantasize about two men together until I realized what represented me in my fantasies and that I don't really want to be a guy.

Here's my most common fantasy: I'm usually some kind of trained person in fighting... like an action hero (or heroine) and I am having sex with a skinny man who has glasses and preferably wears a labcoat. In my fantasies I know he's a super genius. I usually have him pinned and I'm completely dominant over him. The thing I find weird about it is that I don't know if I could ever be so dominant, for one, that I don't know any stereotypical science nerds, for another, and that I am the only girl out of all of my friends that is turned on my the idea of a man weaker than me.

Is that weird?