19 Unwritten Rules That Everyone Seems To Follow

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Sometimes it seems like everyone around you -- and even the universe itself -- is following some sort of guidebook that you don't have a copy of. Meanwhile, you're like some bystander who stumbled into a flash mob and doesn't know the choreography. We're here to help, so here are a bunch of laws and rules that don't seem to be written down anywhere, that everyone else seems to know.