Not only are pixies supposedly magical, but now pixie haircuts allegedly have a magical ability to shrink men's libidos in the blink of an eye!

Some "experts" say it doesn't matter how totally smoking hot you are -- men prefer women with long hair. So if your personality isn't all that great, and underneath that gorgeous mane you've got total Shrek-face, you might want to think twice before copying the 'do that Victoria Beckham, Winona Ryder and Rihanna have been sporting.

According to Manhattan dating guru Matt Titus (author of the charmingly titled "Why Hasn't He Called?"), cutting off your luxurious tresses is "like sending a nonverbal message that you're not interested in sex." That opinion was seconded by British sex therapist and TV personality Anjula Mutanda, who told the Daily Mail, "Long hair is still shorthand for sexual attractiveness."

The Biggest Hair Ever

    Sheena's bouffant was the life of the party. Every party.

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    Kelly figured if she couldn't be at the top of the class she could at least have the top hair.

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    Katie's 'do left her feeling divine.

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    Shannon thought more mousse meant more men.

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    It was a day Brenda -- and her hair -- would remember forever.

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    Andrea's bangs kept Aqua Net in business.

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    "Sure, Jamie gets to go to prom, but my hair is still higher."

    Janice wooed many a suitor with her aura of mystery and hair.

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    Alison took great pains to emulate Marge Simpson, but couldn't yet commit to blue dye.

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    Chrissy was often mistaken for an Emma Drink-and-Wet Doll. That made her sad.

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Apparently, long hair is indicative of fertility, and men are "primevally" attracted to it, along with a curvy body and big, luscious lips. You know, like Angelina Jolie. Or noted drag queen RuPaul.

Some theorize that super-short hair on women is a reflection of the faltering economy. If that's the case, the U.S. is due for a short-hair craze. (Hot tip: Sell your stock in hair extensions, and invest in pomade futures.) Chopping your locks is also a time-honored post-breakup tradition.

Personally, we love the pixie. If you've got the face for it (little features and big eyes, a la Michelle Williams, Natalie Portman and other stars who've rocked this look), and guts to boot, you might as well give it a go. And if it's a total bust, remember those words of comfort your mom offered after that awful $19 Supercuts 'do you got as a child -- "It's only hair. It'll grow back."

Better Off Brunette

    Angelina Jolie proves that even the most beautiful face in the world fades under too-golden locks.

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    Ashlee Simpson was just another pre-fab bottle blonde; dark locks give her a likeable edge.

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    Beyonce's blonde beehive bombed compared to her glam mahogany 'do.

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    Christina Ricci looked washed out under a platinum rinse, while chestnut hair reveals her bombshell side.

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    Drew Barrymore's chestnut tresses give the free spirit gravitas.

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    Jessica Biel is almost forgettable with white hair, but looks red-hot with brunette locks.

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    Mandy Moore looked like everyteen with her honey highlights; her mocha tendrils are mature and sexy.

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    Rumer Willis's peroxided pixie pales in comparison to a short cut in a chocolatey hue.

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    Selma Blair's punky white crop put the focus on her 'do instead of her striking features.

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    Lindsay Lohan earns sophistication points when her hair's more beachy than bleachy.

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