What is If There's Blood, Play In The Mud?
1.
when a woman won't let you have sex with her because she is on her period or when you don't want period blood all over your penis, you have anal sex instead.
Guy: "let me smash that vag"
Girl: "I would let you, but i'm on my period"
Guy: "if there's blood, play in the mud !!!!!"
See
