On the show The Middle, why does Brick talk to his stomach?

Brick of TV's Middle has several quirks, one of which is that he repeats the last thing he says in a sort of creepy whisper while looking down. No explanation for this is given in the show, & as viewers we're just supposed to accept that this is one of his "ticks." Another of Brick's quirks is carrying ketchup packets in his pockets; they "soothe" him. Brick is played by Atticus Shaffer (born 6/19/1998 in Santa Clarita, California), and he's had the role since the series debuted on 9/30/2009.
Updated on Tuesday, February 21 2012 at 10:41PM EST
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