The Rise And Fall And Rise Of The Vibrator

The sex toy was originally marketed as a medical device:

Despite their popularity, vibrators disappeared from the market in the 1920s. The devices were devised for middle-class women, but in a nation as racially and ethnically diverse as the United States in the early 20th century, there were many competing sexual norms. Many working-class women, less affected by middle-class sexual norms, knew what the vibrator could do. The large-scale prostitution industry, although under attack after the crackdown on semi-legal and regulated red-light districts in the 1910s, adapted to new technologies and began creating pornographic films. These films began deploying the vibrator, destroying the fiction that the device was divorced from human sexuality.

It seems that as soon as the connection between sexual pleasure and vibrators became firmly established in American culture, their acceptability as medical treatment vanished and the product disappeared from mainstream society. It was not until the early 1970s that the vibrator again became a common product.