He was fascinated by the question: Why do some belly buttons collect more lint than ... you could have an outie or, more likely, an innie. And innies are ripe for colonization, not only by lint ...

An "outie vagina" is a term that refers to a vulva ... a larger clitoris, and more. Just as belly buttons can be innies or outies, so can vaginas — or more medically accurately speaking, vulvas.