Eh, just call it out, it's India and its subcontinental neighbours. And the reason is less culture and more there being a lot of first-time passengers going to menial jobs in the Gulf, who have been recruited from deep in the countryside and are entirely unfamiliar with things like non-squat toilets and how garbage collection works on planes.
I once flew DEL-AUH next to a gentleman who was clearly very puzzled with nearly every component of his in-flight meal. Not sharing any languages, I helped him out best I could with sign language, but I still remember his expression of surprised delight when he poured one packet's contents straight into his mouth, expecting gutka (powdered smokeless tobacco) but getting powdered coffee creamer instead.
I once flew DEL-AUH next to a gentleman who was clearly very puzzled with nearly every component of his in-flight meal. Not sharing any languages, I helped him out best I could with sign language, but I still remember his expression of surprised delight when he poured one packet's contents straight into his mouth, expecting gutka (powdered smokeless tobacco) but getting powdered coffee creamer instead.