The porn video tag "gay face fuck" refers to a specific type of gay porn content. In this case, the word "gay" specifies that the scene involves two men. The term "face fuck" describes a particular sexual act in which one partner penetrates the other partner's mouth or face with their penis, often forcefully and aggressively. This tag indicates that the video contains explicit scenes of gay men engaging in oral sex in a face fucking manner, intended for adult audiences only.