A young man, seeking to impress a young woman, decides to volunteer one Sunday at a homeless shelter where the young woman volunteers. On the same day, a young man, seeking to do something productive and meaningful on his day off, decides to volunteer at the same homeless shelter. They both help dozens of people in need of food and a warm place to rest, and bring a slight bit of comfort and joy to the lives of the downtrodden. Is one of these two men acting more ethically than the other? A new study in the journal Psychological Science suggests that most people would probably say yes, the second man is acting more ethically than the first. “We were interested in how people evaluate these pro-social efforts in…