Unlike nose hair or neck hair, where less/none is best, what’s up with arm pit hair? What are the rules of engagement?

For the ladies the answer is easy; NONE. EVER. Under any circumstances. Even if you got stranded like that rugby team in the movie Alive and there’s no food around, don’t make excuses ladies. Groom it.

Since it’s theorized the reason it exists in the first place to reduce friction between the upper body and the arm during vigorous physical activity, dudes need it. Also, armpit hairs send and receive sexual pheromones. So trim your armpit hair, don’t shave it. Or else your dense ass may miss out on the “vibe” that girl at the bar is sending your way.