It's happy hour at Hanaro in Bethesda, Md., and I'm with my wife. We're there about an hour, gobbling plates of half-price tuna rolls and washing them down with $3.50 Blue Moons. Have to hurry, happy hour ends soon. My wife slows down and cautions me to do the same. I don't listen. Keep 'em coming, right up to 7 o'clock. Then I get the bill: $75. Yikes, how did that happen? I thought this stuff was half price! Call this stupid male tricks — or behavioral economics.