When comes to food, we've decided the boys are vacuum cleaners. However, they are not the same model. Billy is your basic high powered Hoover, whereas Whitey must be a Shop-Vac, because he's the one who handles the wet stuff, milk!
As previously noted, he can be patient for his milk. Most nights at dinner, he waits quietly on the piano bench until his turn comes.
(Excuse the image quality, this was a badly lighted camera phone snapshot.)