Psychologists studying ethical behavior have documented a curious pattern they call moral licensing: doing something virtuous can make a person more willing, not less, to act selfishly soon afterward. In one line of experiments, participants who first recalled a past good deed later gave less to charity than those who recalled a neutral event. The good deed seemed to function as a kind of credit, a balance the person felt entitled to draw down. The effect complicates a comforting assumption — that practicing virtue steadily builds character. If anything, a single conspicuous act of goodness can license a lapse, as though the moral self keeps a running ledger and resists falling too far into either surplus or deficit. Yet the pattern is not universal. When people frame a good act as evidence of who they are rather than as a discrete deed to be tallied, licensing tends to vanish; the act reinforces an identity instead of paying down an obligation. This suggests that the danger lies less in doing good than in accounting for it. The very habit of keeping score, researchers propose, may be what turns yesterday's generosity into tomorrow's excuse.