You know how your cat brings you a dead bug like it's this fabulous gift? Maybe it's like that.
Possible belief in mystical potty-flushing elvish creatures.
Have you ever heard that thing go? IT'S SO FREAKING LOUD.
Process would take much-needed 0.5 seconds away from Draw Something.
Stupid school won't stop emphasizing the importance of "conserving water."
Maybe he was courteously leaving as quickly as possible for the convenience of his brother?
Got distracted by own belly button.
In their defense, it's not like it's clean in there or anything.
Remembering to wipe, flush and wash hands is obviously too much for a child to jam into a brain stuffed with names of all 649 species of Pokémon.