I was in E. Europe shortly after it opened up. One sure way to tell whether you crossed over into former communist areas (other than the prevalence of Trabants on the road) was the quality of toilet paper. In the formerly communist areas, you could almost still see the wood pulp in it. It was that bad.
In the Middle East, they use lots of bidets in public restrooms, which seems like a good idea, until you walk into a stall and the ground and toiler are covered with fecal contaminated water from all the splashing. Yech!
The worst, however, is that in many parts of the developing world, the toilets are largely squat toilets. Ok for peeing (for a man that is) but doing the deuce is not a pleasant experience.
So translate this into a tropical paradise. Riding on bus through the jungle, people jump out and do their business in the bushes. Watch your step, and look out for the pigs.