Geeks and Sports: Why Do Most Geeks Hate Them?

Something that always bugged me or just struck a chord with me, is the fact that sports seem to be hated among most geeks. It's such a consistent observation that even when a fellow geek is into sports, they are accused of not being a "true geek". I have seen certain celebrities who classify themselves as geeks (I won't name names) say how sports are not popular in their crowd.