A farmer was helping one of his cows give birth when he noticed
his 4-year-old son standing wide-eyed at the fence, soaking in
the whole event.

The man thought, "Great... he's 4 and I'm gonna have to start
explaining the birds and bees. No need to jump the gun, I'll
just let him ask and I'll answer."

After everything was over, the man walked over to his son and
said: "Well, son, do you have any questions?"

"Just one," gasped the still wide-eyed boy:
"How fast was that calf going when he hit that cow?"