US Patent 6866645 Pleasure promotive sexual drive

The pleasure promotive sexual device includes a mechanism assembly composed mechanical devices including a motor. When the motor is activated, an extension shaft in the mechanism assembly is interlocked for impelling a dildo provided at the front end thereof and for further automatic mechanical movements of stretching and contracting back and forth, and pleasure of a certain extent is achieved for the wife followed by that provided by the husband. Therefore both the husband and wife are able to easily come to orgasms, thus relatively flavoring lives of and building happy families married couples.