Twenty. One to hold the bulb, two to turn the ladder, and 17 to be on the guest list.
or
Three. One to climb the ladder while the second kicks the ladder out from under her. And the third to say, "I knew that was too high for you dear."
or
To get to the baaaaarber shop
or
Because the teacher said it was a piece of cake!
or
I don't know. I didn't think sheep could knit
or
In the neigh-borhood.
or