According to New Scientist magazine, a fresh study from the University of Queensland suggests that moderate doses of caffeine will make you more likely to agree with arguments that go against your beliefs. While two cups of the beverage, or 200 mg of caffeine, seem to be the optimal dose, it suddenly sheds new light on why coffee drinkers seem to think morning DJ's are funny, and why those date-ending invites up for a cup of Joe always turn into pajama parties.  Click here to read more.