You know how you often, obnoxiously, try and explain away picking up food from the floor and eating it by swooping down quickly and declaring "5-Second Rule" when really you're just doing it because you're too cheap/too lazy to buy/get another one?
Well guess what? Science is backing up you bull sh*t.
Real scientists did a real study and found that there such a thing as the 5-Second Rule for food dropped on a tile or hardwood floor. Apparently, it takes more than 5-Seconds for germs to infest the food, so as long as you pick it up within that time you can consider it "still good."
However, the rule doesn't apply to those tidbits dropped on carpet.
My favorite quote from the article is, "By the way, if you try getting rid of germs on your food by blowing on it or dusting it off, you're wasting your time. It doesn't work."
I guess that's true as long as you're talking about germs and not your roommate's private area hair.