"The oldest obsidian bracelet, found in Turkey, is dated to c. 7500 BCE. The symmetry of the central annular ridge is extremely precise, to the nearest degree and nearest hundred micrometers, forcing researchers to rethink the manufacturing skills of hunter/gatherers. "
Thankfully, actual humans are immune.
#6
How about sword-carrying, neckbeards or fedoras?
A “Brat” if they’re children. Lamentably, far too many adults are afflicted with this irreversible condition.