1. The design of an excellent sex toy must first meet the physiological and anatomical structure. Different races have very different physiological and anatomical structures. The same user has different hormones, and the influence of psychological factors is also very different.
2. Appearance design is also very important, perfect streamline, beautiful color, silky silicone cover, high-end metal accessories.
3. Whether the buttons are flexible. Whether it is simple to use and easy to operate.
4. Easy to clean is also important. After all, it is a human contact product.