system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] Do Space Marines need to shave?

Whenever we see a depiction of an Astartes with his helmet off, they always seem to have a smooth, hairless, and chiselled jawline. Except for Space Wolves, of course, who rock the manly, luxuriant, beards demanded of a pack of drunken space vikings.

But that raises the question: Why? Are the Space Wolves the only chapter capable of growing facial hair (thanks, presumably, to yet another aberration in their gene-seed), or does every other chapter make a point of shaving daily, even during prolonged engagements when taking off your helmet might not be a good idea?

Or are the Vlka Fenryka all wearing false beards, hooked over their ears with wire?
gpt
Beards tend to get in the way when you're trying to seal full facial helmets, so yes they probably regularly shave (or do some 40K tech equivalent). Space Wolves just go around without the helmet in order to remain at the proper level of shaggy for their chapter.