Mechanical guys and androids show up as the bodies doing the fucking, getting fucked, or serving as partners, usually with metal plating, glowing eyes, and built-in cocks or detachable parts. The sex leans into the contrast between hard synthetic bodies and soft male anatomy, with a lot of focus on plugs, ports, piston-like thrusting, and leaking oil or artificial cum. Some scenes play up control, programming, and “malfunctioning” from overstimulation, while others treat them like fully sentient boyfriends with a sleek sci‑fi vibe.