What is cake eater in porn?

A man who performs oral sex, specifically on a woman's vagina.

Definition

When a male performs oral sex, on a female's vulva they can be referred to as a Cake Eater. The male can be of any sexual orientation, such as being Gay as well as Heterosexual.

This COULD be due to a gay male attempting to keep their true sexual orientation hidden, and be part of a way to give themselves cover.