Little Johnny - Elements!!

The Science teacher asked Little Johnny in class, "Can you name name all the elements."

"Well, there's air, then's there's water," said Little Johnny, "and fire, there's also earth....and yes, there's screwing."

The teacher reacted in disbelief, "That's the most dirty thing to say, Little Johnny, what in Heaven's name made you say it was one of the elements?"

"Ah, I overheard my mother telling her friends," answered Little Johnny, "She said when my father gets to screwing, he's really in his element