Credit: Niko Guido
You might think it's unfair that your teacher grades on the curve--those nerds in class are ruining your GPA--but you're actually grading yourself on the curve in the sack. (At least you've got the nerds beat there...right?)
A new study from the University of Colorado Boulder found that getting laid only makes you so happy; for true satisfaction, you have to get laid more often than your friends.
Even if you're bangin' it out a couple times per month, your chances of depression are 14% higher if your pals are bangin' it out weekly. The problem, says the lead researcher, is that most of us compare ourselves against people we envy instead of people who envy us: "We're usually not looking down and therefore thinking of ourselves as better off, but we're usually looking up and therefore feeling insufficient and inadequate."