Yuck, I bet people wouldn't like it so much if they had to suck on an udder to get it. All milk has traces of cow feces, and blood mixed in there. And these days it's also got lots of other good stuff too, like artificially elevated levels of bovine horomones as well as antibiotics that are required to keep the open sores that these unhealthy dairy cows get on their udders from getting further infected.
I'd be willing to bet that the only reason you love milk is because you've been drinking up milk advertising since you were a child, and haven't had the maturity to question whether it's good for you or not. You've been warned.