Mister Ed: [about the fact that Ed has caused Wilbur a lot of trouble for a sneaky trick he played on his wife and neighbors, so he could have his birthday party] Don't be sore at me, Wilbur. I'm only a nine year old kid.
Wilbur Post: Well, nine years old in a horse is equal to sixty in a human being.
Mister Ed: Then stop yelling at an old man.