They both dribble.
or
the barman says "Oi - get out! We don't want your type in here"
or
Six. One to turn the bulb, one for support, and four to relate to the experience.
or
Nearly unanswerable, since the one who tries to change it usually drops it, and the others call for a planning session.
or
It takes two to tangle!
or
Five. Four to decide which way the bulb ought to turn, and . . .
or
Time is fun when you're having flies
or
She wanted to see a butterfly.
or
A snail because it carries it's home.
or