"Gay bareback" is a porn video tag that specifically refers to content featuring male-on-male sexual activity without the use of condoms or protection. The term "bareback" is derived from "bareback riding," which is a rodeo event where riders go without a saddle or pad, making it an intense and risky activity. In the context of pornography, bareback represents the act of engaging in sexual intercourse without protection, which can be seen as risky behavior. The term "gay" indicates that this specific content involves two men (or male-presenting individuals) participating in same-sex sexual activities. This tag is used to clearly label and categorize pornographic videos for audiences who are specifically interested in watching gay bareback scenes.