I guess the first question is, does milk spoil when it is still inside the animal and if not, why does that not happen? Like cow milk. If I don’t milk that cow for a week, the milk wouldn’t spoil, right? But if I put a jug of pasteurized milk out in the environment, it would spoil, right?
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Your body is made up of about 60% water. If you took a glass of water and left it on the counter for a couple weeks, mildew would start growing in it. But the water in our body is much older than a couple weeks, and has no mildew. The mildew will only grow because microbes got in the water. Inside the body, those microbes would be killed by our immune systems. It’s the same thing with milk in mammals.
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