I have a friend who is a high school biology teacher. A few years ago, her class dissected a sheep’s brain. After class, one of her students confessed to her that he had licked the brain!!! (I’ll pause here for a moment so you can wrap your own brain around that….) Unsurprisingly, this caused an immediate uproar. The school nurse was appropriately concerned about possible health issues (prions that can cause horrific diseases, poisonous chemicals, etc.). On the other hand, an administrator questioned whether my friend had failed to preemptively instruct her students NOT TO LICK THE BRAIN. Um, what? I think we can agree that is one of those things that is so glaringly obvious you should not have to spell it out as a general matter.