The annals of history are full of inventions that changed the course of human civilization. From the creation of fire and agriculture to the lightbulb and iPhone, there are countless innovations that are as vital as they are enduring.

On the other hand, humans have also had their fair share of trial-and-error moments. Here are some of the most ridiculous inventions from history that were (thankfully) left in the past.

1. Anti-masturbation device