Dr. Samuel Johnson (18th century English) would avoid stepping on craks. In addition he would touch them with his walking stick. Nikola tesla , the great electrical engineer, had a phobia about pearls. If he entered a room where a woman was present (wearing a pearl necklace) he would leave the room-he reported that this made him physically ill. There must be some explanation for these compulsive behaviors…
‘There must be some explanation for these compulsive behaviors…’
Yeah, OCD.