That's how (why) wearing their pants down under their butts became such an integral part of rap culture fashion. That practice started 'way' back in the prisons as a sign you were a homosexual 'bottom'.
Such a twisted cruel 'joke' on largely fatherless black youth .. on top of the suicidal drug-gangster aspect as well of course.

Bingo.

It goes all the way back to slave days
Called bucking
Let slave owners know who would bend over

Yep. That's been going around for a while now - decades - re: feds inventing g-rap. Just like whatever else they touch, they poisoned a music genre when they co-opted it. Early rap was about dancing and having fun.

I have a hard time believing all of them are gay. Cypress Hill, for example, doesn't strike me as that.

I know plenty of guys who wear their pants like that, including my nephew and he is definitely not gay.