asking a girl to buy you a drink works because it's role reversal, and it demonstrates you have balls and don't put girls on a pedestal. instead of the girl thinking "oh, another free drink, nice," she's now thinking "who the hell is this guy getting me to buy him a drink?"

even if it's in the negative, it's still better than the neutral reaction.

anyways, back on topic, mixchange, that's not strange. some of the richest people in the world are very frugal. warren buffet comes to mind.