This porn video tag, "gay dildo (gay)", refers to a scene in which two men are involved in a homosexual sexual encounter, and one or both of them uses a dildo for sexual stimulation. The term "gay" in this context simply emphasizes the fact that the participants are male and engaging in same-sex activity. A dildo is a sex toy usually designed to resemble a penis and is used for penetrative play. This tag indicates a specific type of adult content meant for an audience interested in gay pornography involving the use of a dildo.