I typically eat at my computer also. Then my semi-OCD goes ROAR SHIT THAT DOESN'T BELONG ON DESK. Then I say, "ok semi-OCD I'll take it away and rinse it."
The cultural norm part of the discussion, I'm not really understanding. Did the OP say he was forced to leave home somewhere and I missed it? If not, he made that choice, and he probably had reasons for wanting to, and now he's forgetting those reasons. Unless, I guess, the reasons were simply, "I'm supposed to."