Crisco shortening was introduced by Procter & Gamble on August 15, 1911. Made from vegetable oil, it was an improvement over using lard for cooking and helped housewives get better results with their baking. It was especially celebrated for the flaky pie crusts it produced. However, some gay men use it for an entirely different purpose - as a lubricant for "fisting". (When Crisco was introduced in smaller containers the joke was that this convenient size was sold only in New York and San Francisco.) In 2002 P&G sold the brand to the J.M. Smucker Company.
And that's not the only connection Crisco has to the gay world. 30+ years ago there was a popular gay disco located in New York's Meatpacking District called Crisco Disco. A large Crisco Can served as a DJ booth (pictured, left) which comfortably fit up to ten people. More recently, gay clubs in Tampa and Venice Beach have held weekly "Crisco Disco" nights when classic disco is played. Then there was the peculiar disco-oriented album released in 1977 by poet Rod McKuen called Slide ... Easy In. Because of the album's cover art (pictured, right) many in gay circles referred to it as the "Crisco Disco album".
So, in closing, if you innocently mention Crisco in a social gathering or at a business presentation and hear snickering, there's a good chance that gay men are in your midst.