The electrically powered vibrator was invented in the 1880s by doctors, who were treating women for "hysteria" for centuries by performing what today would be considered masturbation. At the time, however, not only did doctors regard the "vulvular stimulation" required as having nothing to do with sex, they reportedly found that it took a lot of time to do and it was hard work. The vibrator did it more quickly and easily, and because of this it was very popular with doctors. Home versions soon started being made and they were also popular, with adverts in places like "Needlecraft", "Woman's Home Companion", "Modern Priscilla" and the Sears catalog. These disappeared in the 1920s, apparently because their appearance in pornography made it no longer tenable for polite society to avoid the sexual connotations of the devices.