From the 1950s through the 1970s, the vibrator became what academics like to call a camouflaged technology. Mail-order catalogs full of household tchotchkes featured beautiful women with long, silky hair loosening their tight shoulder muscles with banana-shaped vibrators. Also popular were vibrators that doubled as nail-buffer kits, hair brushes, backscratchers, and some that were designed as attachments for vacuum cleaners. Most of them were cheesy, battery-operated devices that came in shag-carpet hues: avocado, gold, and burnt orange.