Can you drink too much milk?

[RedRosesForMe]

My boyfriend loves milk. Loooooves milk. To the point that I find it almost repulsive. I'm not a fan of it myself (I even lied in kindergarten and said I was allergic so they'd give me orange juice at snack time), but I appreciate its use in cereal, and maybe with some cookies. Other than with cereal or the occasional glass, though, I am really grossed out by it.

The boyfriend says that he used to drink a gallon of milk a day, and probably still would if it weren't so expensive. I was thinking, that can't really be healthy for you, can it? Even children, who need the fat and calcium, only drink a couple of glasses a day.

Is too much milk harmful? I'm thinking things like kidney stones, maybe. Are there any complications from excessive milk consumption?