"Gay Slave Training" is a porn video tag that denotes a particular type of adult content. In this case, it suggests the scene involves homosexual interactions and focuses on one participant submitting to another in a dominant/submissive role play scenario. The term "training" often implies an element of instruction or education, which can involve various sexual activities and techniques being taught or practiced between the individuals involved. This specific tag is meant for adult audiences who enjoy gay content featuring elements of BDSM, power dynamics, and role-playing.