Penguins typically mate only once a year and lay one egg.
John F. Kennedy had a sister, Rosemary, who was mentally retarded. She had a lobotomy, at that time not known to be that bad. In 1357 a dead woman was crowned as queen of Portugal. She was princess Inez de Castro, second wife of Pedro the I, called the Justicer, of Portugal. When he took the throne, Pedro captured two of the men and had them tortured to death in a chamber, joining the one he was dining in.