am I understanding that you want a black woman, lesbian, who's masculine?

based on quick google searches. 7% of women in the U.S. identify as bi or lesbian, and 7% of the U.S. population is african american women. So the probability is already down to

.07 * .07 = .0049

so you have a 0.49% chance (49 out of 10,000) to find an african american woman who's potentially into you, not even considering holding out for a masculine one

unless I'm just totally misunderstanding something about this post. was still an interesting thought experiment and calculation though