Ignoring the obvious conversation about downs, a story:

A friend of mine when we were roughly 20ish had a pregnant dog, and needed to go out of town. Asked me to watch the dog in case she had the puppies. I agreed. She then became very serious about complications in labor, and I told her not to worry, I had the vet’s number, and dog’s generally have an easier time of it than people. She kept going on about making sure she would be alright, and after listening to her for several minutes, it became clear she did not understand what would be happening, and was concerned there was a chance one of the babies would get stuck in the dog’s butt. Because she genuinely thought sometimes babies can come out the butt if they get lost in there.