Malcolm Pickard, a teenager from 1960s England, created a device called the “Snogometer” to measure the voltage of passionate kisses. The device involved holding electrodes in each hand, with sound effects and a lighted scale showing the level of passion. Despite spending two pounds on electrical equipment and testing it on a couple, the device was deemed dangerous and left a coppery taste in users’ mouths. However, the Snogometer earned Pickard a brief stint of fame, receiving fan mail from all over the world and even recognition on the street. Ultimately, the invention did not go anywhere, but it remains a quirky relic of teenage ingenuity from the 1960s.