If instead of cows they milked humans and sold it in bags at stores would you buy it or even once drink it? No. So why cows, there isn't anything differnt except the cows are dirtier and such. I can tell you why you do drink it , is beacuse you were tought to , you yourself never thought up to go milk a cow and drink it. Its just one thing most people never think on, but it is so grose, if you wouldn't drink milk from a random human no way you should drink it from a random cow. It is so grose when i finally realiized what i was drinking and forgot those lies i was tought so i would drink it i went no.