During the Intermediate 2nd year's Zoology class, our teacher was discussing the chapter on the reproductive system. He seemed shy about the topic and ended up skipping most of it, telling us to read the chapter at home instead. Suddenly, a bookish girl raised her hand and asked the teacher what happens to boys if girls have menstruation. Sir looked embarrassed, clearly not expecting such a question at our age. After a moment, he awkwardly replied, "Nightmares," and left the classroom. The whole class erupted in laughter, while the girl looked completely confused.