A 24-year-old man whose girlfriend accused him of sexually assaulting her during the night told doctors he had no memory of it. When sleep specialists in Paris recorded him overnight on infrared video, they confirmed a rare sleep disorder and noticed an odd detail about which hand he used.
During partial awakenings from sleep, the man repeatedly slid his left hand into his pants and touched his genitals. Twice, he made movements suggestive of masturbation, always with his left hand. Yet he later told doctors that when he is awake, he always uses his right.
