英语笑话 什么是性感

　　A little boy returning home from his first day at school asked his mother, "Mom, can you tell me, what is 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 guy produced an enrollment form, which he had brought home from school and said, "Yes, mom, but how am I going to get all that into this one little square?"