The term marital aid is used to refer to sex toys and products intended to improve or enhance lovemaking.
More About Marital Aid
For many years, obscenity laws forbde the sale and sex toys in many US states (some states still have these laws). Terms such as “marital aids” were employed by retailers to get around these laws.
The first documented use of the phrase in print advertising is from a 1969 ad for California’s Erotica Theatre and Bookstore.