Sex dolls have come a long way since their inception in the 17th century. Today's sex dolls are incredibly realistic, thanks to advances in technology and materials. They are made from silicone or TPE (thermoplastic elastomer), which mimics the texture and feel of human skin. They can be customized to include a range of features, from hair and eye color to breast size and body type. Some even have built-in heating elements to provide a more lifelike experience.

The technology behind custom sex doll has also improved in terms of their internal structure. Today's anime sex dolls can have articulated skeletons, allowing them to be positioned in a range of sexual positions. Some even have robotic components, such as AI chatbots or vibrating motors, to enhance the experience.

These technological advancements have not only made cheap sex dolls more realistic, but also more accessible. With the rise of e-commerce, sex dolls can now be purchased online and shipped discreetly to a customer's door. This has made it easier for individuals to explore their sexuality and desires in the privacy of their own home.

As technology continues to advance, it's likely that big booty sex doll will become even more realistic and sophisticated. While some may view this as a negative trend, others see it as a way to provide individuals with a safe and satisfying sexual outlet. As long as sex dolls are used responsibly and ethically, they can serve an important role in society.