Think “good personality” is a euphemism for a not-so-hot date? Think again. Knowing your date has a good personality can make them more attractive to you.

In this study, a team of researchers (led by YouBeauty attraction expert Viren Swami) tested whether personality affects physical attraction. They asked a group of 2,157 men, ages 18 to 68, to rate the attractiveness of women’s bodies, ranging from emaciated to obese. One group saw information about the women’s personalities before viewing the photos, while the control group saw only the photos.

Personality mattered. Men primed with positive personality information were attracted to a wider range of body sizes than the control group. Specifically, a good personality made heavier women more attractive.

But get this: Men primed with negative personality information were attracted to a narrower range. In other words, a good personality made body size matter less, while a mean streak created more pressure to look ‘perfect.’

If you want to look gorgeous, primp your personality.