The ability to talk about sex freely and without fear of being judged by others is THE key to having a more satisfying sexual life. Having said that, letting oneself be seen can be challenging. It's possible that uttering certain terms out loud makes you feel awkward or that you're worried about how your partner will respond if they discover what you're into.
It is not always easy to discuss your preference for a dominance-submission relationship with new partners, especially if you are afraid of overtly driving them away or of being labeled as a misogynist.