On the softness level, silica gel or tpe is softer and more elastic than meat. As long as the lubricating oil is almost no difference, even if it is a small amount of lubricating oil, it is not comfortable. Compared with the advantages of real people, it is convenient, cheap, hygienic, and can choose channels without lines. Disadvantages TPE silicone has a long life and will become hard, easy to get dust, not easy to hide, not easy to care, ...