Previously unknown supply teacher, GCSE biology class, walked in and announced that he had a higher sperm count than any of us. He left the room, promising to answer any question on sex that we could write on scraps of paper and place in a coffee pot on the desk at the front. Amazingly, some of us actually wrote questions, and he answered them all deadpan. We never saw him again, but the legend of Sperm-count man lives on. I hope he found a job where his utter coolness and phenomenal sperm-count were more appreciated.