Because I hear it irritates him.
If it wasn't so serious, I'd almost say Barack Do Your Ears Hang Low Obama's complete inability to run the office he's been elected to is starting to get entertaining.
While I can't put in a timeframe, I'm willing to make a small bet that at some point, he actually loses his shit during an interview. Of course, I'm not exactly willing to put money on it since I have a feeling O will be working hard to make sure the hardest questions asked of him revolve around which flavor of ice cream he likes best.
I'm willing to make a small bet that at some point, he actually loses his shit during an interview