I personally wouldn't like being called a slut in any sircumstances, I know some people do because thats what they like and i can see the appeal. I think however, its important for everyone to not put all subs into the same boat. My master would never call me a slut but things like mine etc he does and I love that.
some people just assume that they have respect and yet they have done nothing to deserve it. I submit because their is mutual respect.