LOS ANGELES -- Henry Cho says he can run and play basketball all day long, but if he goes to a shopping center with his girlfriend, he'll be "dead in half an hour."
"It should be part of a triathlon," he suggests. "Make a guy swim a mile, ride a bike for 30 [miles] and walk through a mall with a girl. Ain't a man alive who can do that."
According to social scientists, personal shoppers, marketing researchers and authors who have studied behavioral differences between men and women, Mr. Cho makes a critical point: Many men lack the "shopping gene."