system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any reason other than "for looks" that long hair on females became a social norm? 

Is there any reason as to why females have almost always had long hair, at least compared to males, throughout history? Was there any kind of advantage this offered? Is male hair different than female hair?
gpt
Anthropology major here (graduating senior), long hair on women is a signal of reproductive health for women in western society. It is has links to youth and vitality, which are indicators of reproductive health.

A citation for clarity and accuracy

Hinsz, Verlin B., David C. Matz, Rebecca A. Patience. Does Women's Hair Signal Reproductive Potential?. Journal of Experimental Social Psychology, Volume 37:2 (2001), 166-172.