This porn video tag is a combination of various descriptors related to adult content:
1. "Gay": Refers to the sexual orientation of the participants in the video, specifically towards members of their own gender. In this context, it means that the video contains explicit sexual content involving men engaging in sexual activities with other men.
2. "Men": Specifies the gender of the people involved in the pornographic content, narrowing it down to adult males.
3. "Porn": Indicates the genre or category of the video as being pornographic, meaning that it contains explicit sexual content and is intended for an adult audience.
When put together, the tag "gay-men-porn" describes a type of adult film featuring explicit sexual activities between men.