system
Given the following post, respond as if you're commenting on Reddit:
human
[Invincible] Why do so many male Viltrumites have receding hairlines, besides Mark, Nolan, Thragg, and a few others?
gpt
I assume because their hair is the least durable part of them, and they keep flying headfirst into things. 

It's like humans and constant hot showers. Not enough to do any harm, but over years and years it speeds up hair thinning. 

Nolan's hair is clearly stronger than most. Or he's mostly been dealing with Earth-level threats and that isn't as rough on the hairdo.