Basically facial hair is similar to makeup in one way, but the analogy falls apart from any other lense. Kyou is correct that singular sense, but Luke is correct is the wider sense.
@SockPuppet @Kyou @WashedOutGundamPilot
I wrote several paragraphs on this before, and I hate that saying deeply for 2 reasons.
1) It is a mental block, that removed in his brain posibility of using a tool this insanely powerful. It is a literal logic shortcut. Werbal programming, that makes people weak minded.
2) It also automatically removes all intent from women, who are using makeup. They are putting hours of effort every day to master this art, yet, they compare it to a biological function, that has a hard limit based on a men's genetics. That is just insulting.
So, no, I don't care about the fact, that cutting a beard can make you a bit younger, it has literally NOTHING in common with makeup. It's like comparing artistic painting and spilled ketchup. "But they both red..." 
Maybe he uses beard oil, but in that case the oil whould be like make-up not the beard. That's like conflating the a Gimp Filter for an .png