The recreational drug known as ecstasy may have a medicinal role to play in helping people who have trouble connecting to others socially, new research suggests. In a study involving a small group of healthy people, investigators found that ecstasy prompted heightened feelings of friendliness, playfulness and love, and induced a lowering of the guard that might have therapeutic uses for improving social interactions. The researchers suggested that ecstasy might help people with post-traumatic stress disorder as well those with autism, schizophrenia or antisocial personality disorder cope with a variety of emotional difficulties.