Cheerleader effect
The Cheerleader effect, or group attractiveness effect is a kind of cognitive bias: People who are part of a group are seen as more attractive, than those who aren't. This observation is valid for both men and women. The effect was coined by Barney Stinson (played by Neil Patrick Harris) in American sitcom How I Met Your Mother. It was first academically described in a study done 2013, and the result is backed up by another in 2015.