Vibrator

: Vibration helps relax isometrically held muscles, improving blood flow and "reprogramming" how the body processes sensation. The Vibrator | Scientific American

For years, a popular "feminist fairy tale" suggested Victorian doctors invented the vibrator to treat "female hysteria". While research now suggests it was actually first patented in the 1880s by Dr. Joseph Mortimer Granville to treat , the device quickly found its way into homes. vibrator

: It was the fifth electrified domestic appliance, appearing in catalogs alongside fans, toasters, and tea kettles. appearing in catalogs alongside fans