A: Use the crisp dollars first

Maybe this is why they call it “money laundering” people tend to spend dirty, crumpled old bills faster than their clean, new ones. In general, no one likes to touch things countless others have handled before them and are more eager to pass then on, say researchers Fabrizio Di Muro and Theodore Noseworthy. The habit is especially true with obviously filthy, worn and crumbled currency as the condition is proof that the cash has passed through a lot of hands. Say their pair: “Consumers may value a crisp banknote more than a worn one because they believe the latter is disgusting and they want to be rid of it.” However, people are much more likely to unload their spanking new money instead of well worn stuff if they think that others are watching them. Folks feel they are being socially judged based on the condition of their spending cash, the researchers add.