A Professor was teaching a Health Class... When he posed a question to his students. ""I hope you have all done your reading from last night, so tell me, what part of the human anatomy can expand to four times its smallest size?"" Seeing a girl not paying attention in the middle row of his class, he called on her: ""Susan, you look as if you are very knowledgable in this topic, would you care to answer?"" The girl could only retort ""Are you insinuating that I am a slut? I cannot believe you Professor! How could you ask me something so inappropriate! The dean and my parents will hear about this and you will lose your job!"" The professor merely chuckled and asked the boy who had done his reading next to her the same question, upon which he replied correctly ""The pupil."" The professor then turned back to the girl and said ""Susan, from your response I gather three things. First, you didn't do your reading as I assigned. Second, you have a very dirty mind. And third, someday in your life, you will be VERY disappointed in your lover.