When you go to college to become a teacher, there are plenty of things that you'll learn in the process. Professors will teach you things like how to draft lesson plans and how to engage students who would rather be doing literally anything else than sitting in your classroom and listening to you talk. There is one thing these lessons definitely won't cover: how to avoid having sex with your students. Do you know why? Because it's one of the most obvious rules in the world. However, that doesn't stop plenty of teachers from breaking it every year.