fun fact: archeologists sometimes throw up upon realizing they've licked human remains, because it was common in Italian and Anatolian cultures to bury babies in the walls if they died within ten days of being born. They were literally considered garbage. However, they look like any other bone if you don't know what baby bones look like, so people just lick them to see if they're bones. It's the fastest field diagnostic because the hollow canals suck the moisture out of your tongue, and very few rocks will do that.