Experts agree that comfort in a sex doll hinges on several key factors. First, the material plays a vital role; soft, skin-like materials such as high-quality silicone or TPE provide a realistic and comfortable tactile experience. Flexibility and joint mobility are also crucial, as they allow users to position the doll naturally without strain or discomfort. Proper weight distribution and ergonomic design contribute to ease of handling and prolonged use, preventing fatigue. Temperature regulation features, like built-in heating elements, add to the realism and comfort by mimicking human warmth. Additionally, the texture of the skin—such as subtle veins or textured surfaces—can enhance realism and sensory pleasure. Maintenance and hygiene are important as well; dolls that are easy to clean and maintain tend to remain comfortable and inviting over time. Experts suggest that adjustable features, like removable or repositionable parts, allow users to customize their experience for maximum comfort. Overall, a combination of realistic materials, ergonomic design, and personalized features creates the most comfortable and satisfying experience with a sex doll.