4 Things Guys Notice Instantly

According to a new study, a person's physical appearance allows others to form surprisingly accurate first impressions. So you may want to think twice about what kind of image you're projecting with these traits dudes check out immediately, says Ky Henderson, a male editor for Cosmo.
MORE: Find out 18 things that that he won't notice!

1. Your Smile

Does it seem sweet and genuine? Does it seem awkward and forced? Does it seem like you ate a sesame-seed and parsley salad for lunch based on what's lodged between every single one of your teeth?

PLUS: What impression does he gets about you from your apartment? Hint: He thinks your hand towels are dumb.

2. Your Hair

Guys have no idea what split ends are, and if you mention roots, they just think of the band. But they do look to see if your hair looks 1. soft and 2. as though it would smell good. So don't request "The Gosselin" at the salon, and wash it every so often. That's all guys ask. If it's time for a cut, our Ultimate Hair Makeover Tool will hook you up with ideas for a killer new style.

3. Your Cleavage

Newsflash: Dudes like to look at your chest. (They aren't the only ones who like to compare cleavage. We're addicted to this new game, Cleavage Wars.) Now, that's not to say they think all women should unbutton their shirts to their bellybuttons at funerals. (Though really, who are guys to judge?) But they will notice how you're showing off what you've got. Read our tips to make your cleavage even sexier.

4. Your Skin

You know that blemish you've been obsessing over all day because it's so huge? Chances are guys won't even notice. What will they notice? If you look like a jaundiced Oompa-Loompa because of overenthusiastic tanning. Another reason to Practice Safe Sun.

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Reprinted with permission of Hearst Communications, Inc.