In a story entitled “Scientists Hint at Why Laughter Feels So Good,” the New York Times reports on a study that attempts to pin down exactly why laughing until it hurts feels so good. The study suggests that the pleasure lies in the physical act of laughing. The simple muscular exertions involved in producing the familiar “ha, ha, ha,” he said, trigger an increase in endorphins, the brain chemicals known for their feel-good effect. Robert Provine, professor of psychology and a noted expert on laughter, said he thought the study was “a significant contribution” to a field of study that …