Shunga was probably enjoyed by both men and women of all classes. Superstitions and customs surrounding shunga suggest as much; in the same way that it was considered a lucky charm against death for a samurai to carry shunga, it was considered a protection against fire in merchant warehouses and the home. From this we can deduce that samurai, chonin, and housewives all owned shunga. All three of these groups would suffer separation from the opposite sex; the samurai lived in barracks for months at a time, and conjugal separation resulted from the "sankin-kōtai" system and the merchants' need to travel to obtain and sell goods. It is therefore argued that this ownership of shunga was not superstitious, but libidinous.