Lake Narrow Head is a pun on Lake Arrowhead in the mountains of Southern California. It was a popular vacation spot for the entertainment industry and regular folks alike.
The bathing suit ensembles modeled at the pool were extremely fashionable at the time. Swimming attire was evolving rapidly in the mid century era. The daring French bikini had made its debut just five years prior, on July 5, 1946, created by designer Louis Réard.
Howard Beckerman, who was an inbetweener for Famous Studios at the time, came up with the title for the cartoon and got a pay of $5.00.