The term "kissable lips" in the context of a porn video refers to a specific type of scene where characters are engaged in a passionate and intimate act of kissing. This tag typically signifies that the participants have soft, smooth, and visually appealing lips, making the viewer want to engage in the act themselves. It also implies an emphasis on sensuality, passion, and intimacy rather than aggressive or forceful actions. This is a common term used in adult content for describing specific types of scenes where kissing plays a significant role, often highlighting the attractiveness of the characters involved.