Light bulbs in the choir room

How many altos does it take to screw in a light bulb?

None. They can’t get that high.

How many sopranos does it take to screw in a light bulb?

One. She holds it up and waits for the world to revolve around her.

How many singers does it take to screw in a light bulb?

Two. An alto to actually do it, and a soprano to stand by and ask, “Isn’t that a little high for you?”