A large-scale adult toy, the fuck machine, like an industrial work machine. When you turn on the switch, an extra-thick dildo performs a piston-like motion with a win-win sound. We had eight women who enjoy masturbation experience this fuck machine. Initially, they were surprised by its mechanical appearance, but after applying lotion to the dildo and repeatedly inserting it into their wet pussies, they gradually increased the speed of the piston movement, reaching orgasm in sync with the machine's motion.
