"Anal-sissygasm" is a porn video tag that describes a specific type of sexual scene involving anal play and the concept of sissy. In this context, the term "sissy" refers to a man who takes on a submissive role in sexual activities, often including humiliation and feminization elements.
The tag suggests that the porn video features a dominant partner (usually a woman) having anal sex with the submissive male partner, referred to as the "sissy." This scene may include additional elements such as cross-dressing, verbal humiliation, or other forms of degradation. The term "sissygasm" implies that the sissy's pleasure and orgasm are central to the scene, often achieved through extreme submission and mental/emotional arousal rather than physical stimulation alone.