system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 If male pattern baldness is caused by testosterone, why are hairs on top of the head more affected by it and hairs like eyebrows, beard, inside ears etc, are affected less?
gpt
Because hair follicles are different! It's super obvious comparing beard hairs, arm and leg hairs, even pubic hairs to head hairs. However, hairs on the head are also slightly different. The one up top are more susceptible to DHT, the "high-power version" of testosterone, that people make a little later in life. 

Now, if you wanna know WHY? No clue. Bodies are weird.