A little boy returning home from his first day at school
said to his mother, "Mum, what's sex?"

His mother, who believed in all the most modern educational
theories, gave him a detailed explanation, covering all
aspects of the tricky subject.

When she had finished, the little lad produced an enrollment
form which he had brought home from school and said, "Yes,
but how am I going to get all that into this one little square?"