A middle school teacher is the latest to be caught being a sexual deviant. When you become a teacher, you willingly place yourself in a position of power over vulnerable and impressionable students. As a result, you're trusted to act appropriately and professionally all times. It's the most basic requirement of the job. Actually, it might not be the most basic requirement. You can certainly argue otherwise, but I'd say one of the fundamental tenets of being a teacher is "don't have sex with your students." You'd think it would be common sense, but that hasn't stopped countless teachers from violating it.