What is Love?

The teacher asked the class if anyone could give the class an example of love.
Little Susie stood up and said, "I saw two robins making a nest together, I think that is love".
Very good said the teacher, anyone else?
Little Johnny stood up and said I think love is "fucking".
The teacher was shocked and told little Johnny to go home and not to come back without a note from his father.
The next morning Little Johnny was back in class, the teacher asked, "Do you have a note from your father?"
Little Johnny said, "No, my father said love is fucking and anyone that says it is not is a cock sucker and he doesn't correspond with cock suckers."