Sex, Drugs, and ... Charity? Brain Study Finds New Links

The warm glow that many donors get from giving to charity involves the same brain mechanisms that evoke pleasurable sensations after sex, eating good food, and using heroin or other drugs, a new study has found.

To examine the interplay of self-interest and altruistic behavior, researchers at the National Institute of Neurological Disorders and Stroke, in Bethesda, Md., studied the brain activity of 19 men and women, each of whom was given $128 and asked to make choices about whether