Soft Places (1978)

Returning from the funeral of her very wealthy and prominent husband, the widow, accompanied by her family attorney, discusses the unusual will her husband has left. In order to inherit the full benefits of this "spoken will" it is required that the widow experience every known sexual activity. Through these outrageous activities, possibly her frigidity will fade, and a truly loving woman will be unleashed. The experiment works! In one sexually explicit act after another, the widow wins the inheritance and her complete sexual freedom!