This invention relates to a machine consisting of a fixed base and a reciprocating platform which imparts that reciprocating motion to a person lying, kneeling, or sitting upon it. A gear motor mounted in the base of the machine drives an eccentrically mounted cam roller. As the cam roller rotates, it is retained in a channel on the underside of the reciprocating platform. The eccentric rotation of the cam roller is converted to linear motion, causing the platform to move back and forth on rollers. The reciprocating motion has a stroke of about one to six inches and a frequency of about 10 to 200 cycles per minute. A detachable appliance mounting holder allows the user to mount a dildo of their choosing to the fixed base in genital proximity. The reciprocating motion of the platform is an aid to sex for both healthy and physically challenged individuals when used with another person for partner sex or used with a dildo for solo sex.
