There is a reason most people throughout the world become lactose intolerant after infancy. You are
not meant to drink milk after infancy. Now, with that in mind, why would you drink milk meant for infants that happen to be cows?
Sometimes, they grow into a big strong bull.
Yeah, and always, they stop drinking milk after infancy.
Go to notmilk.com. There's a lot of interesting literature studies posted there. Although obviously the site does have an agenda. Then again, the whole "milk is good for you" myth is perpetrated by the milk industry, and you can bet your ass they have an agenda as well.
There are numerous reasons why you should not drink milk. Not drinking it can improve your digestion. Studies have shown that drinking milk produces a buildup of puss in your body. The hormones in milk has been shown to produce acne. Just go to notmilk.com....lots of interesting stuff there.
And as has been said, milk isn't nearly the vital source of calcium as it's made out to be. There are plenty of better sources of calcium than milk.
I stopped drinking milk about a year ago, and almost immediately my digestion was much better, I didn't have so many runs to the bathroom, and my acne cleared up. I generally felt better. And wuddaya know, all because I stopped drinking something that nature designed us to stop drinking after a very young age. Oh wait, nature didn't intend for us to drink the milk of other species anyways.
And yeah, if you're a guy and care about the build of your body, stay away from soy.