A large-scale adult toy, a fuck machine, like a machine tool. When you turn on the switch, a super thick dildo repeats piston motion with a win-win sound. We had 8 masturbation-loving women experience this fuck machine. At first, they were surprised by the machine-like appearance, but they spread lotion on the dildo and insert it deeply into their wet pussies. Gradually increasing the speed of the piston, they climaxed in time with the machine's movements.