Why A SpongeNo posterWhy A Sponge1940Queuebrick VideoWatchedWWatchlistLFavoriteFLists1940Copy short linkWhy A Sponge10m·DocumentaryDirected by Mary Field·1940RateRateA Secrets of Life short.DirectorMary FieldStudioGaumont-British InstructionalCastCrewDetailsWhere to watchNo cast listed.