• Slide 1 of 13: Romantic couple
  • Slide 2 of 13: Smiling woman
  • Slide 3 of 13: Man carrying basket with healthy produce in grocery store
  • Slide 4 of 13: Portrait Of Smiling Mid Adult Woman In Houhai, Beijing
  • Slide 5 of 13: Man sitting on a park bench
  • Slide 6 of 13: Woman smiling at a man in a bar
  • Slide 7 of 13: Bearded man looking at razor
  • Slide 8 of 13: Close up of young woman putting on lipstick
  • Slide 9 of 13: Woman looking at a man in a coffee shop
  • Slide 10 of 13: Portrait of young man by bridge, Dusseldorf, Germany
  • Slide 11 of 13: Couple drinking beer at a pub
  • Slide 12 of 13: man with book relaxing in hammock
  • Slide 13 of 13: People on rollercoaster, (wide angle)
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Science tells us that life is better if you're beautiful.

You're healthier, more persuasive, and people will just generally think you're smart and trustworthy.

But turns out, you don't have to hit the genetic lottery to become more attractive to the opposite sex.

Thanks to a slew of studies on sex and attraction, we found 12 grooming tips, attitude adjustments, and other fixes for both men and women that are proven to make you more appealing.

2/13 SLIDES © Blend Images RM/Getty Images

Keep those teeth pearly white.

A study confirmed that a white and evenly spaced set of teeth make people seem more attractive.

The study, from researchers at the British universities of Leeds and Central Lancashire, found that teeth are "the human equivalent of a peacock’s tail," according to The Daily Mail.

They are a sign of health and good genetics that help select a mate.

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Eat your fruits and vegetables for glowing skin.

Eating more fruits and vegetables is a natural way to make your skin look more attractive, a study from PLoS ONE showed.

Fruits and vegetables are loaded with antioxidants and plant-based pigments, which give skin a healthy hue.

Plus, the results are instant. Participants in the study had rosier cheeks and healthier looking skin with just an increase of one portion of fruit and vegetables a day.

4/13 SLIDES © Xixinxing/Getty Images

Women should smile more.

Turns out, there's a reason that creep on the street is always asking you to smile.

Happiness is the most attractive emotion in females, a study called "Happy Guys Finish Last: The Impact of Emotion Expressions on Sexual Attraction" published in Emotion showed.

Researchers found that a simple smile causes men to find women more beautiful.

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Guys need to brood a little more.

Brooding and swaggering men are much more attractive than men who are smiling, according to a study from the University of British Columbia. In fact, the women surveyed said happiness was the least attractive quality in a man.

But the study was based only on "gut reactions on carnal, sexual attraction," one of the study's co-authors told The Daily Mail, not whether the men would make a good boyfriend or husband.

The study could explain why some women are attracted to the "bad boy" persona.

6/13 SLIDES © Don Bayley/E+/Getty Images

Women should play dumb if they're looking for a fling.

This one pains us to write. But ladies, if you're looking for a one-night stand, it's best to play it stupid.

In a study published in Evolution and Human Behavior, graduate students at the University of Texas–Austin found that that men were most attracted to women who appeared "dimwitted- or immature," or "sleepy or intoxicated" for a one-night stand (charming).

Women who appeared quick-witted and lucid, on the other hand, were found less physically attractive.

Thankfully, the opposite was true when men were seeking long-term partners.

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Guys should shave their beards.

Women rated men with bearded faces as less attractive in a recent study in the Oxford Journal.

The study found that men with beards were seen as more aggressive and of a higher social-status, but not better looking.

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Women should also keep red lipstick handy.

Ladies, pick up some red lipstick next time you're at the drug store.

A woman's lips are the most attractive part of her body, especially when colored with red lipstick, a study from the Manchester University revealed.

The study found that men stared at a woman's lips for seven full seconds when they were colored red. In comparison, they spent just 0.95 seconds looking at her eyes and 0.85 seconds gazing at her hair.

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Men should play hard to get.

A study in Psychological Science showed that women found a man more attractive when she wasn't sure how strongly he felt about her, as opposed to when she was certain he was very interested in her.

The study found that women started thinking about a man more when she was uncertain if he really liked her or not. Then, she would conclude she liked him since she couldn't "get this guy out of her head."

Overall, the study suggested that if men hold back some of their feelings at the very beginning, and create some mystery, he'll be more likely to hook a member of the opposite sex.

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Guys should pick up a shirt with a "T" (we're not kidding).

Researchers at Nottingham Trent University found that when men wore white t-shirts with a large black letter "T" printed on the front, women found them 12% more attractive.

The scientists suggested that the shirt creates an illusion that broadens the shoulders and slims the waist, producing a more V-shaped body that women found sexy.

In contrast, men wearing a top with an inverted "T" — with the bar running around their waist — were deemed up to 12% less attractive.

11/13 SLIDES © Roy Mehta/Getty Images

Women should use a higher-pitched voice.

Forget everything you know about a husky voice being considered sexy — women should use a higher-pitched voice when speaking to a man they're interested in.

Researchers at University College London found that men were more attracted to women with high-pitched voices because it conveys a smaller body type.

12/13 SLIDES © Caroline von Tuempling/Getty Images

Men need to take a deep breath and relax.

Women find less-stressed men substantially more attractive than their more-stressed out rivals, a study published in Proceedings of the Royal Society B journal found.

The researchers concluded that men with low stress levels are considered more attractive because handling a stressful situation suggests having a "strong" genetic makeup that can be passed on to children.

13/13 SLIDES © Chad Slattery/Getty Images

And everyone should go for a ride on a roller coaster.

A study from last year revealed that roller coaster riders found their non-romantic co-riders more attractive after a whip around the track, according to The Daily Mail.

There was no difference for couples who were already romantically linked, so this trick only works with potential partners.

More than 1,000 people participated in the study, which first appeared in the Archives of Sexual Behavior

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