Researchers have found a genetic link between physical pain and social rejection, which means the good-girl character in Grease may have found breaking up with her holiday romance truly excruciating.
Psychologists at the University of California studied the gene responsible for regulating the body's most potent painkillers, known as mu-opioids.
Painful: Scientists have identified that the gene responsible for regulating the body's painkillers is also involved in sensitivity to unpleasant social experiences more>
