I'll share mine first.

I had a psych patient one night pile shitty toilet paper next to his toilet overnight. Normally my psych nurse brain would consider this a symptom of disorganized psychosis, EXCEPT!

I remembered an aita post about a conflict between a western OP and his middle eastern roomate trying to figure out why their roommate put their shitty toilet paper in the trash. Turns out many middle eastern toilets can't handle toilet paper.

Oh and inpatient psychiatry doesn't provide freestanding hard plastic trashcans (turns out they make great clubs). We gave him one of our freestanding paper bag trashcans and problem solved.

TL;DR; Reddit expanded my cultural knowledge enough to differentiate disorganized psychotic behaviors from a genuine cultural difference. Thanks reddit!

Anyone have any similar examples of positive exchanges of knowledge or culture using reddit?