Well, yeah, if by "poop-encrusted barbarians" you mean "the most dedicated dandies of their time." With their carefully coiffed hair and trimmed beards, history's Vikings would have scoffed at Chris Hemsworth for looking like a Nordic hobo who spent a night in a dumpster.
"What woman would have me?"
It turns out, the only thing Vikings loved more than a fine day pillaging and slaughtering was the sort of personal grooming most of us modern people wouldn't dream of bothering with. Seriously, they were way, way into that s**t: Pretty much every non-slave member of Viking society wore absurdly complex hair and beard styles they freely peacocked with to display their status in the community. Most owned elaborate grooming kits that included tweezers, razors, tiny scissors, and, presumably, the new album of that bone-horn player you've probably never heard about.
The humble comb alone was such an important part of Viking society that no warrior worth his mead left home without one. Women carried their elaborate combs in a special purse made solely for that purpose (yes, Vikings had purses), while the men kept theirs in special carrying cases slung from their belts (yes, Vikings had fanny packs). Those combs saw a lot of use, too. Vikings were the Dark Ages equivalent of greasers, constantly grooming their 'dos while somehow still managing to look badass.
"Rinsing with the blood of your enemies always gives you that extra bounce and volume."