No. Can I ask why would you assume that? I don't know who those girls were but based off of my crowd, we actually never meet black men. Even online , I mostly saw white , Spanish, and Asian in the area and those were 98% of my inbox. Oh, I ended up not feeling attracted to any of them enough to take it anywhere.
I don't care about race. I want to feel chemistry. If I don't feel motivated enough to go see a person , I don't even bother. So I guess, I haven't found the right personality for me either.
It could be a number of things. They could have already had boyfriends. You shouldn't assume things like that unless they tell you. If they did , it's pretty ignorant.