According to expert Robert Provine, laughter is specifically a social structure, something that connects humans with one another in a profound way [source: Provine]. According to his findings, people are 30 percent more likely to laugh in a social setting that warrants it than when alone with humor-inducing media [source: Provine]. That means that you're more likely to laugh with friends while watching a comedy together than when you're watching the same show or movie by yourself.