Second category... of humor. Of violent humor. And clubs. Clubs that cavemen knocked each other over the heads with. But this is needed in addition to the first category of humor and clubs, because in the first category you don't get the one of a smiley hitting himself with a club. That could be used to hilarious effect in a conversation. Duh.
Hit your head over Messenger. We advise... you download that smilie today. (I'm talking about MSN Messenger). By the way, the spanking one is a little risque. So... click here to download emoticons for MSN Messenger.