Jonah Hill is hurt

I honestly wouldn‘t mind if my partner is more attractive than I am

Iirc that's not actually a "new" study. It's been around for a long time

Not only women, people in general. It's because if you feel that someone's really "out of your league" (ugh I hate that expression, as if everything was just about looks), you might get paranoid about them cheating or leaving you for somebody else. This shouldn't be an issue if you love your partner and trust them, or, you know, if you're not a shallow person who only puts value in looks, but apparently most people are.