I think the reason is that both of them simultaneously adorn and hide the body. They're both revealing and concealing. You can use them to express yourself -- but at the same time, they cover up some part of you, make it secret, inaccessible.
I've collected masks for years, and whenever I travel, I try to bring home a new one. The result is that a number of the walls in our house are festooned with masks of various origins -- Ecuador, Iceland, Spain, Belize, Alaska, Thailand... My oldest one is from Côte d'Ivoire, made in around 1880, that my parents got me for my 30th birthday. It's pretty unusual, not only for its age, but its design -- from the front, it's a human face, and from the side, it's a lizard.
Lately I've taken advantage of the recent purchase of a kiln by making masks out of clay. We've only had the kiln for a couple of months, so I have a lot in process, but (thus far) only two finished.
Broken Face, March 2019, white stoneware with copper glaze
"It’s here that archaeologists have found the remains of the oldest house in Britain, exotic jewelry and mysterious headdresses," says exhibition curator Dr. Jody Joy. "This was a time before farming, before pottery, before metalworking – but the people who made their homes there returned to the same place for hundreds of years."
The exact use of the masks is, of course, lost in the shadows of prehistory. The guess is that based upon cultures that still make such artifacts, they're ceremonial in nature, probably used by priests to represent gods or tutelary animal spirits, but there's no way to confirm or refute that.
One wall of my office
As will be obvious to any long-time readers of Skeptophilia, I have a positive fascination with things that are big and scary and can kill you.
It's why I tell my students, in complete seriousness, if I hadn't become a teacher I'd have been a tornado chaser. There's something awe-inspiring about the sheer magnitude of destruction they're capable of. Likewise earthquakes, hurricanes, wildfires...
But as sheer destructive power goes, there's nothing like the ones that are produced off-Earth. These are the subject of Phil Plait's brilliant, funny, and highly entertaining Death From the Skies. Plait is best known for his wonderful blog Bad Astronomy, which simultaneously skewers pseudoscience and teaches us about all sorts of fascinating stellar phenomena. Here, he gives us the scoop on all the dangerous ones -- supernovas, asteroid collisions, gamma-ray bursters, Wolf-Rayet stars, black holes, you name it. So if you have a morbid fascination with all the ways the universe is trying to kill you, presented in such a way that you'll be laughing as much as shivering, check out Plait's book.
[Note: If you purchase this book using the image/link below, part of the proceeds goes to support Skeptophilia!]