Take my advice and shave it off at once; for that beard is a creator of lice and not of brains. His take on long facial hair was meant to be amusing, but it was also instructive — beards can and do attract lice. Whether you're a hairy hipster or just a guy that hates to shave, you may already be familiar with lice, that ever-present, itchy threat that sweeps through schools and homes every year. They're most commonly head lice Pediculus humanus capitis , which skitter around on the human scalp sucking blood and laying eggs. As it turns out, though, head lice don't live in beards because facial hair is too coarse and too widely spaced to make a suitable home.