Once, when living in South Korea, I met up with a couple of expatriot friends and we went out together. I don’t entirely recall where we were going or what we were doing, but it involved taking the Seoul Metro.
While out, they told me about how older folks in Korea didn’t really feel any sense of public shame as we would understand it in the States. They’d spit on the ground and make all sorts of bodily noises, and no one would really be all that bothered by it socially.
Sure enough, while walking down our destination’s metro platform, this elderly Korean man right in front of us let out the loudest and longest flatulence. We giggled for at least 10 minutes afterwards.