The most common material is silicone, although there are some other materials available such as glass, rubber, plastic, metal, jelly, and even wood. Silicone is the best choice because it is soft enough to slide easily into your body without causing any damage. It’s also flexible so you can bend it to fit whatever shape you need. Silicone is great for beginners who don’t want to risk hurting themselves during their first experience with anal sex.