Narcissist is a term used to describe someone who has an excessive interest in or admiration for themselves, often characterized by a sense of grandiosity and lack of empathy for others. In the context of a porn video tag, it can refer to scenes where a person exhibits this trait, either through their actions or fantasies revolving around self-admiration and self-pleasure. This could involve masturbation, exhibitionism, or other behaviors that emphasize the individual's physical appearance or sexual prowess. It is a term used by adult audience experienced with porn videos and familiar with psychology terminology.