Wee One: "Why are the cows all outside?"
Wife-like Substance: "They like being outside to roam and they can keep their milk cold."
WO: "Their milk? Why does it have to be cold?"
WLS: "Well, they have milk in their bodies and you like your milk cold, right?"
WO: "Yes. How does the milk come out?"
WLS: "Cows have udders that farmers squeeze to get the milk out."
WLS: "The udders are underneath them in the back?"
WO: "Milk comes out of their bum?"
PLS: "No, near their bum, but lower."
WLS: "Underneath them."
WO: "Does milk come out of their knees?"
WLS: "No, I'll show you a picture when we get home."
WO: "Nose? Ears? Mommy, does milk come out of cows' EYES? Hahahahaha"