I've got one: It's part of the stereotype.
More, though: Know why he chooses to live up to the stereotype like that? It's a defense mechanism. What he's defending against, we guessed at over in his butt thread. Which ties in with the stories about him handin' out handies in mens' rooms.
He's a homo.
And if there's one group of folks cupcakeers love to hate on when they take a break from hating whitey, it's homos.
So the stoop anchor puts on the Central Casting cupcakeer act to pass for your run of the mill yard ape. Now you know why, though: It's so the real yard apes won't guess what he's really into and beat his ass like a shitskin piñata. He probably does it online just to stay in practice for when he has to do it out in the real world.