Pennies, you see, are easily the subject of scope insensitivity. When we come across a penny, we don't think, "Hey, that's something worth 0.05% of what I wish I had come across. I could buy a 25th of a gumball, a mouthful of an unhealthy carbonated beverage, a couple of seconds of footage on DVD, or enough gasoline to go a tenth of a mile." We think, "Hey, that's money," and we grab it.

Wrong for me. When I see a penny, I think "I can't buy anything without a lot of those" and don't pick it up.

Actually, I don't even do that. I probably did at one point but then built up a heuristic where I don't even think that....I just don't pick up pennies.