I am a male, white, 72 years old, submissive and a slave, and i have been called cunt many times by my Mistress L. It is a term that she uses both as a term of endearment, and as a term to put me in my place in her house.
But yes you are right that the word submissive or slave is the same for both sexes, but then again, it does not matter what sex we are, we are what our master or mistress wishes us to be. I have served women for 55 plus years, and have also served men at the orders of my Mistress, and have been called many things, and it all comes down to, she or he is in charge, and will address me as she or he wishes.

slavedoggieboy