Clerk: "Yes, sir. What size does your alligator wear?"
or
To log on.
or
Because pepper makes them sneeze
or
Three:
One to write the light bulb removal program,
one to write the light bulb insertion program, and
one to act as a light bulb administrator to make sure nobody else tries to change the light bulb at the same time.
or
A bad lawyer makes your case drag on for years. A good lawyer makes it last even longer.
or