Abs
 

In a (not-so-surprising) study conducted by Western Illinois University, women rated abs as the sexiest muscle on a man’s body, ThePostGame.com reports. It makes sense; your abdominals are front and center—well, if you’re not wearing clothes—so her eyes are inevitably drawn there at first-glance (other than your face, of course). Lucky for you, you can sculpt your abs; no such luck with changing your face. And to be fair, it’s not that women are completely shallow. Men with a large amount of abdominal fat have lower levels of testosterone, which translates to a lower sex drive and fertility, according to Gordon Patzer’s book "Looks: Why They Matter More Than You Ever Imagined."