Maths....

He's teaching her arithmetic,
He said it was his mission,
He kissed her once, he kissed her twice
And said, "Now that's addition."

Then as he added smack by smack
In silent satisfaction,
She sweetly gave the kisses back
And said,"Now that's subtraction."

Then he kissed her and she kissed him,
Without an explanation,
And both together smiled and said,
"That is multiplication."

But then Dad appeared on the scene
And made a quick decision.
He kicked that kid three blocks away
And said, "That's long division!"