selects a plurality of vibration and throbbing reciprocating girth expansion combinations by selectively activating the main motor 18 and or the vibrator motors 47 in accordance with methods known to those skilled in the art the speed switch actuator sequentially selects different speeds of both vibration and throbbing also in accordance with methods known to those skilled in the art regarding the throbbing or reciprocating girth expansion a preferred range of throbbing rates is between approximately 50 to approximately 180 times per minute preferred vibration rates are from approximately 20 per second to approximately 120 per second suitable materials for the drive shaft 20 and the guide rods 28 include hardened steel suitable materials for the support member 30 the dome member 32 the vibrator housings 46 the control housing 50 and the switch actuators 56 57 and 58 include abs suitable materials for the drive cams 24 and the passive cams 27 include pom and other substantially rigid plastics suitable materials for the battery module include polypropylene and suitable materials for the phallic sleeve include elastic plastic materials such as tpe a suitable battery complement is four type aaa alkaline batteries with further reference to fig5 10 an alternative configuration of the mechanical dildo designated 10 u2032 includes counterparts of the cam mechanism designated 12 u2032 the control module designated 14 u2032 the phallic sleeve designated 16 u2032 the main motor 18 and the gear train 22 there are four of the drive cams designated.