Milk comes from ...

Yesterday we went to the fair and she was loving this cow and talking to it and mooing at it, and there was a guy standing nearby who said, "She's going to be milked in about 15 minutes over there if you want to come watch."
So after we had looked at a few more animals we went and watched the milking demonstration. It was fascinating, he didn't do it by hand he had a trailer with a professional type hook-up and he talked about how they do it at the big dairies. But anyway, the demonstration got all done and we were leaving and I said to her, "Now you know where milk comes from."
She replied, "Yes, from cow's butt."