Guys get bored with their faces. It's just a fact of life. And it's as true today as it was 500 years ago. Which goes a little way towards explaining some of the many grooming fails that have happened over the years. After all, if there's a weird way to sculpt hair or highlight a feature, there's a man who, at some point in time, has tried it. And that's all well and good. Until, that is, such pioneering spirit sparks an unfortunate fad. From feathered hair to mutton chops to hair-metal, well, everything, here are the worst grooming trends of all time—and why you should do everything in your power to avoid them.

Not Bathing - Middle Ages and Earlier

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Apart from the ancient Romans, this is a grooming mistake made by pretty much all of human history, pre-Enlightenment. Must have been a gamey couple of thousand years.

Caked-On White Makeup - 17th - 18th C.

Let's just go ahead and establish the rule that Madonna as Marie Antoinette at the 1990 MTV VMAs should never be a guys' grooming template.

Powdered Hair and Wigs - 18th C.

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Silver fox is a great look. But it should be natural. And it shouldn't be piled up three feet above your head.

The Lincoln Neckbeard - 1860s

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If you're growing a beard, a mustache is required. Sorry Mr. President, but looking like you're using a gerbil as a chin strap is a swing and a miss.

The Hitler Mustache - 1930s/40s

Maybe it's just its connotation with one of the most downright eveil men in history, but that little furry caterpillar is, was, and will always be a horrible form of facial hair.

The Mop Top - 1960s

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Sure it may be iconic, but it's pretty weird looking haircut. Although it does appear to offer a fair amount of forehead protection.

Feathered Hair - 1970s

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"Feathered" is not an adjective you ever want to use when it comes to grooming.

Everything About Hair Metal - 1980s

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The zenith of the modern grooming fail came with hair metal in the 1980s. Suffice it to say, you shouldn't have half a pound of sticky spray in your (back-combed) locks. And skip the heavy guyliner. There are better ways to make your eyes really pop (like, for instance, getting a good night's sleep and using an eye cream).

The Mullet - 1980s

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Nope, that's not party in the back. That's just a bunch of ugly-ass hair cascading down your shoulders.

The Center-Part Bowl Cut - 1990s

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A good shape to hold fruit or cereal. Not so good for hair.

Frosted Tips - 2000s

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Frosted cupcakes, frosted donuts, frosted windows during Christmas—but never frosted tips. You shouldn't look like you've had half your locks dipped in gold paint.

Overly Groomed Eyebrows - Current

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Do you like looking permanently surprised? Or like a cartoon villain? Because those are basically your only two options if you choose to go with this (frighteningly popular) grooming decision. Maintain, yes. But don't go overboard.

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