cience 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.Meredith Galante contributed to this story. Keep those teeth pearly white. REUTERS/Jo Yong-HakA study confirmed that a white and evenly spaced set of teeth make people seem more...