This porn video tag refers to a specific fetish known as "urophilia" or "urolagnia." It involves sexual pleasure derived from urine, particularly when it comes to watching, engaging in, or fantasizing about urinating. People with this fetish may find the act of urinating itself sexually stimulating or enjoy the sensation of having someone else's urine on their body. This tag is used to identify content featuring urination as a significant element within the porn video.