Armpit Hair?

Armpit hair signals sex because it grows during puberty and is one of the first signs of maturity (and fertility). And it signals sex because it transmits the scents that lead to mating. It triggers disgust because it reminds humans how dangerous sex can be. And that’s why we shave it off. Because armpit hair betrays the western fantasy about sex, which is that sex is fun, pleasurable, innocent, and inconsequential, a fantasy that elides the evolutionary truth. The revulsion at armpit hair might be evolution’s way of saying “proceed with caution,” and its removal one less barrier to cross.

Why Are We Grossed Out By Women With Armpit Hair” by Lisa Miller. This is a really interesting read on the evolution of our relationship with body hair, and specifically, our visceral reaction to armpit hair. [Science of Us]