I'd like to kick this off with a wild idea: you should never be embarrassed by anything that happens between the sheets, as long as it's between two consenting adults. Regardless of what you like, you shouldn't feel ashamed. Which is easier said than done. Especially when it comes to dominant and submissive behavior in the bedroom. Fret not, I'm here to give you plenty of reasons not to be embarrassed about being submissive in bed. Because there's no reason to be ashamed of what you like. I don't care if it's pop music or whips and chains, if you like it, own it.
The answer is yes. Feminism and sex-positivity are about enjoying your body and enjoying your sexuality. If you're getting hung up on whether or not you should be embarrassed about something that happens between the sheets, you're not enjoying either. Your sexuality is something that you should be empowered to enjoy however you please. Because it's yours. Your body is your own. Your sex life is your own. Safety, consent, and support are all important things to take into consideration while you're in the bedroom. But so is what you want. Not allowing yourself to be shamed by your sexual preferences is what sex-positivity is all about.