One day when I was a junior medical student, a very important Boston surgeon visited the school and delivered a great treatise on a large number of patients who had undergone successful operations for vascular reconstruction. At the end of the lecture, a young student at the back of the room timidly asked, "Do you have any control subjects?" The surgeon drew himself up to his full height, slammed the desk with his fist, and said, "Do you mean did I NOT operate on half the patients?!" The hall grew very quiet then. The voice at the back of the room hesitantly replied, "Yes, that's what I had in mind." Then the surgeon's fist really came crashing down as he thundered, "Of course not!! That would have doomed half of them to their death!!" God it was quiet then.... And one could scarcely hear the small voice ask: "Which half?"

Mr. Jacobs, the biology instructor at a posh suburban girl's junior college, said during class, "Miss Arnold, would you please name the organ of the human body, which under the appropriate conditions, expands to six times its normal size, and define the conditions." Miss Arnold gasped, then said coldly, "Mr. Jacobs, I don't think that is an appropriate question to ask me. I assure you my parents will hear of this!" With that she sat down red-faced. Unperturbed, Mr. Jacobs called on Miss Jones, another student, and asked the same question. Miss Jones, with composure, replied: "That would be the pupil of the eye, under conditions of dim light." "Correct," said Mr. Jacobs. "And now, Miss Arnold, I have three things to say to you: One, you have not studied your lesson. Two, you have a dirty mind. And three... you will someday be faced with dreadful disappointment."

A new general was allotted to a new army base. After some time in the base he realized how there were two army men guarding an empty bench in shifts. He asked his colleagues and his juniors what it was all about. A colleague said “I don’t know but it’s been a tradition here since joined 35 years ago.” The general confused as he was went through the past generals of that base till he found the one that was in charge 35 years ago. He attempted to find him, and found that he had retired and he lived in the countryside now. He contacted him and requested to meet. On the day of the meeting the general asked the retired commander why that bench was guarded so much. The commander was shocked. “So you’re telling me the paint on that bench hasn’t dried yet?!”

A fifteen-year-old Amish boy and his father visited the city for the very first time. They wandered around, marveling at the different sights. Eventually, they got to a mall.  They were amazed by almost everything they saw, but they were especially amazed at two shiny, silver walls that could move apart and then slide back together again. The boy asked, "What is this Father?" The father (never having seen an elevator) responded, "Son, I have never seen anything like this in my life, I don't know what it is."  While the boy and his father were watching with amazement, a fat old lady in a wheelchair rolled up to the moving walls and pressed a button. The walls opened, and the lady passed between them into a small room.  The walls closed, and the boy and his father watched the small numbers above the walls light up sequentially. They continued to watch until it reached the last number, and then the numbers began to light in the reverse order. Finally, the walls opened up again and a gorgeous 24-year-old blond woman stepped out. The father, not taking his eyes off the young woman, said quietly to his son: "Junior, go get your Mother."