it just fades unevenly due to all of the moisture and skin in the mouth... you shed skin cells in your mouth so quickly everyone i know has had theirs touched up 3 or 4 times atleast, and thats in a 5 year timeframe.........
http://www.flickr.com/photos/markwp/212656676/in/set-72157594364601069/ http://www.flickr.com/photos/markwp/291272836/ http://www.flickr.com/photos/markwp/291273252/ http://www.flickr.com/photos/jzbassguitar/2775528665/sizes/o/
It's from Fight Club, here's what it says: http://i130.photobucket.com/albums/p268/pepperminta1019/fight.jpg
Wow, I have looked through all of these....all beautiful. I also love text tattoos...there are so, so , so many text tattoos that I want....if only I had the money!