Because he chews on them constantly. Eeeewwww!
Sometimes he jams all four corners into his mouth at the same time. Other times he rotates from one corner to the next on a one minute per corner rotation. It's totally gross. They never get a chance to dry out. Ick!
Just thought you might want to know that. (Plus, my camera actually managed to focus when I took these pics, so I had to share them)
I'm off to my Time Out tomorrow. I'm leaving at 3pm Friday and won't get back until after kid-bedtime on Saturday (I might get back into town before bedtime - but I ain't comin' home until after!). Have a great weekend!