The vibrator was invented before the vacuum.

To be clear, this is on a consumer level. Vibrators were first used for medicinal reasons in 1878, and didn’t become consumer available products until 1900. It was ten years before the electric vacuum became an available consumer product.

The vibrator was actually the fifth electric home appliance. Only the sewing machine, fan, tea kettle, and toaster were consumer products that came first. It took a decade before the iron and frying pan would come along as consumer products too!

Most of these “vintage” vibrators are powered by A.C. electric power (about 80% of them). You can view some of the models at the source, but be forewarned that you should only visit it if you’re old enough to know what a vibrator is. Despite that, it’s a completely safe for work gallery.

(Source)