77. A betel nut stain on a road in the Highlands Region.

Buai, the local name for betel nut, is a drug that’s widely consumed in Papua New Guinea. Locals chew it mixed with lime powder and mustard greens. They spit red saliva everywhere, sometimes in front of your feet before even saying hello to you.

Buai stains look exactly like blood. You see them everywhere: on the roads, on the walls of buildings and in the parks. At one point, I saw police beat a woman who was a buai seller. When they hit her face, red saliva came out of her mouth. Or was it blood?

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