I think it's a few things:
Way more black women are left alone than black men. Our brehettes are the least desirable women on the planet
. Whereas a black male can make do with whatever ass needs some attention
Even though they are the least desirable, their
beauty is the most desirable...that has to play a heavy emotional toll.
Lack of intamacy...this is universal and applies to everyone...it hits us/them hard because of the above.
It's far more acceptable to be a lesbian and bi for women...it's even wanted by most guys that ain't trying to wife up nobody.
Just my opinion, someone will say it better tho