Most friendships begin over shared interests, but psychology research suggests that shared dislikes can be surprisingly powerful too. A 2006 study by researchers from the University of Oklahoma and the University of Texas at Austin found that expressing the same negative attitudes toward other people or things often helps strangers feel connected more quickly. Agreeing on what you dislike can create a sense of similarity and mutual understanding.

That does not mean healthy friendships should be built on negativity alone. Shared dislikes may help break the ice, but lasting friendships are built on trust, loyalty, shared experiences, kindness, and support. The study simply highlights that negative opinions can sometimes be a stronger conversation starter than positive ones.

So the next time you instantly click with someone over a mutual annoyance, there may be a psychological reason behind it. Just make sure your friendship eventually grows around the things you enjoy together, not only the things you dislike.