Sissy Dildo is a term used in the porn industry to describe a specific type of content. In this case, "Sissy" refers to a male who has taken on feminine characteristics or has been feminized, often as part of a role-playing scenario. The word "Dildo" signifies that a phallic object or strap-on is being used for penetration in the scene.
So, Sissy Dildo content typically features a male character who has been feminized either through appearance or behavior and is engaging in sexual activities using a dildo or strap-on device. This can include both solo scenes where the sissy character uses the dildo on themselves, as well as scenes with other participants. The focus of these videos often lies in the humiliation, submission, or degradation aspect associated with the feminization and use of a dildo.