It's to magnify the emotion expressed. In the olden days, before emoticons, people used a larger vocabulary to express themselves, but often times that failed t

It's to magnify the emotion expressed. In the olden days, before emoticons, people used a larger vocabulary to express themselves, but often times that failed to express the magnitude of their feelings. They used !! for that purpose. Of course, today we see the abuse of the !! quite rampant. I LOVE YOUR HTML5!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! is an example of this. Note that this is a post-fix operator.