A new bit of research suggests that, if we're speaking in idioms, you've got to give a little to get a little.
Scientists from two universities interviewed 800 people about their relationships and their inclination to give, measuring qualities like donating to charity, donating blood, and helping classmates. They found that altruistic people, regardless of age, were more successful romantically, with more significant others and more sexual partners than people with selfish inclinations—though note that the results were based off self-reported habits.
Somewhere along the line, humans evolved to recognise that giving was far sexier than withholding.
Think about it: in primitive human ancestry, who was more likely to attract mates—the hunter generously sharing his kill or the hunter selfishly guarding his meal? Definitely the first guy. The results from the survey were especially marked for men in this regard, meaning men had even more success when acting altruistically than women.
Now seems as good a time as any to start writing out those tax deductible charity checks.
From: Esquire US