Which Screwdriver?

While helping a friend assemble furniture, I asked her five-year-old son to bring me a screwdriver.

"Do you want a 'Daddy' screwdriver or a 'Mommy' screwdriver?" the little boy asked.

Confused but preoccupied, I absentmindedly said, "Bring me a 'Mommy' screwdriver."

The child came back and handed me a butter knife.