The conversation between human and AI assistant.
How functional/necessary is armpit hair?
Hmm, I didn't know that. Is there any evolutionary advantage to having armpit hair?
Some scientists believe that armpit hair may have acted as a means of protection for our ancestors by providing insulation and warmth to the armpit area. Additionally, as I mentioned before, the ability to trap and hold onto pheromones could have played a role in reproductive success. However, these are just theories and more research is needed to fully understand the evolutionary purpose of armpit hair.