Likes, the gay morbidly obese autistic brother of dislikes, are an unofficial form of currency on the majority of websites. It gives a sense of "worth" to the users of the internets, and it's the rubbery black dildo of the internets that penetrates users to keep posting. More often than not, the more likes you have forcefully shoved up your anus, the more "kewler" you are to other users. These like whores are seen as bad asses by the foolish users who fall blind to their faggotry, and are butt-buddies with the mods.
