After working for almost a total of 10 years in Kyrgyzstan, Yemen and Azerbaijan, I've seen my share of holes in the ground.
The key is planning and discipline. There are 'real' toilets to be had. Learn where they are.
Never put yourself in a position - whether by eating or drinking - where you will have to use the facilities at an unknown establishment.
Learn what leads to unexpected and urgent bowel movements and avoid that behavior. (And also carry a roll of butt wipe in your backpack, briefcase, care, etc.
Good luck!
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