Hey I really love calling people ‘baby’ during sex. You can come off as so genuinely affectionate, “come here baby, thats it. Does that feel good, baby?” as you lightly rock into them, or you can shove their face down into the sheets and growl into their ear as you rail them. “Whats the matter, baby? You sound all choked up. Doesnt that feel good, baby?”
You could make such a switch into teasing and sadistic with just one word