Eight year old Benny came home from school and informed his mom that today in class they had learned how to make babies. The mother, rather shaken by the development, immediately called Benny's teacher. After listening to the mother complain for a few minutes, the teacher responded, "Did you ask him to explain how it is done?" "No, of course not" said the mother. "Then ask him and call me back." replied the teacher. "So how do you make babies?" the mother asked her son. "It's really easy mom," Benny responded. "You drop the 'y' and add "ies".