Designing full-function sex dolls for maximum realism involves meticulous attention to detail in both aesthetics and functionality. Artists and engineers collaborate to craft facial features that mirror human expressions, with lifelike eyes, realistic skin tones, and detailed facial structures. High-quality silicone or TPE (thermoplastic elastomer) materials are used to replicate the softness, elasticity, and warmth of human skin, making touch feel authentic. Internal skeletons composed of metal or plastic provide articulated joints, allowing the doll to assume natural postures and movements. To emulate human warmth, heating elements are embedded within the body, offering a comforting temperature akin to real skin. The incorporation of responsive sensors enables the doll to react to touch with movements or sounds, further enhancing realism. Fine details such as fingernails, hair, and even subtle body hair are added to increase authenticity. Many models also feature customizable features like hair color, eye color, and body shape, allowing users to personalize their experience. The integration of sound systems that produce moans or speech, along with heating and movement, all work together to create an experience that closely mimics real human interaction. Overall, the careful combination of advanced materials, precise engineering, and aesthetic craftsmanship makes full-function sex dolls remarkably realistic.