While I personally don't find many things funny, I can understand shows like Seinfeld and South Park: I see the joke, I see the punchline, I can see why people would laugh, but I personally don't laugh. In fact, I don't actually remember the last time I laughed. I'm not depressed or anything at all, though. However, I seem to be able to make other people laugh in social settings which means I understand the mechanics of humor but...I just don't laugh. Kind of weird. I think it has something to do with the fact that I don't feel much emotion (I don't).