Better Performance - Sex dolls are excellent partners to help improve your technique in bed. By masturbating with a sex doll, you are able to practice how you thrust, breathe, and pace yourself for a longer session. You can in turn use the opportunity to figure out how to best stimulate the clitoris from various angles and get the deepest penetration possible, without ever having to deal with an exhausted or annoyed human companion.
CybOrgasMatrix dolls used an elastic gel, which they claimed to be superior to silicone in elasticity, shape memory, and durability. Both this company and the company "First Androids" once offered pelvic thruster motor, audio capability and heated orifices, though these options are no longer available. Several modern doll manufacturers now offer the last option on their silicone dolls, with the addition of an internal heating system.