From reddit: My sorority started this behavior, and I kept it up.
"I've even been doing this alone without anyone knowing where I am.
We started going to bars in Harlem and having sex with black men only and went there specifically to have sex on the first date with a black man. It was part of our hazing.
I've been going now on my own and having anal & vaginal sex with one or more black men at the same time..."