Yes they are
.
They don't start out being that way but over time we make them that way. By we I mean us brothers and their cucks.
First thing they have sex with us . They find out how good fucking is with us. For the first time they really get into it enjoy sex , enjoy fucking thats when they become sluts. Sluts for black cock but sluts nonetheless. Now being a slut especially when its for black cock is nothing wrong . Your wives are finally having great sex so they want more of it. Nothing wrong with wanting something good in your life especially when it makes you feel good. So being a slut is good. Next with their cucks help they become submissive to us. We begin to dominate them to control them. And then maybe we make whores out of them. Which is like a slut bet she makes us some money for it.