Anal: Refers to the sexual act involving the anus, either for penetration or stimulation.
Sissy: A term used to refer to a male submissive in BDSM or fetish play. This usually implies that the male individual is dressed up and/or treated like a female, often as part of a humiliation aspect.
Training: In this context, it refers to the process of teaching someone (usually a sissy) how to perform anal activities, whether willingly or under duress due to dominance and submission dynamics.
So, "anal-sissy-training" is a porn video tag that signifies content involving the training or instruction of a male submissive in engaging in anal play or intercourse, often with an emphasis on humiliation and domination.