Red Wings

The act of practicing cunnilingus on someone during their menstrual cycle is referred to as "red wings" in colloquial language. The phrase comes from the belief that after oral sex, her partner's face and bloody lips resemble the wings of a crimson bird.

It's also said that someone who engages in oral sex with a person who is menstruating has earned their "red wings." Initially used by Hells Angels, the word has since become more well-known. It is less typical to say that having sex with a person who is menstruating in any way has earned someone their crimson wings.