Decades ago, this wasn't a big deal because no matter how the doll looked, it looked unreal. Most custom sex dolls were made of cheap plastic and looked ridiculous. However, the latest generation of sex dolls are carefully crafted using materials such as TPE and silicone. The most advanced sex dolls are even able to talk, sense changes in their owner's moods and react, and that's enough to make many people feel insecure. Meaning.