I am looking for the title of an adult movie my grandfather used to loan me. In the movie, there are two women who are tired of the wrong men and decide to build a "robot" to pleasure them. During the movie, the women do extensive "research" to get the "robot" just right. However, there is not an off button and the "robot" completely wears them out and he goes on the prowl for other women. One scene I remember, he picks up a waitress at a bar. This is how the whole movie goes, but I am not for sure how it ends. Please help if anyone knows the name of this vintage adult movie.