How does he know animals don't do this? True you don't see any animals go get a little cup, making sure to catch their midstream, and then drink it. You do see animals clean there genital area with their tongues though. I've personally seen a cat urinate while it was cleaning itself and it drank that right up and it just happened to be sick at the time. I think animals do drink urine, another thing they do is eat their own feces and they also eat vomit(at least cats eat vomit). Drinking their own urine is not that much of a stretch.