Click to view Using a Cadbury's chocolate dispenser you can pick up for around $10, a loving boyfriend hacked it so it'd only release a bar when the recipient girlfriend's Twitter friends tweeted a swearword.

Before her friends cottoned on and spammed her feed with rude words, she could flick and switch to reveal the "nice mode," which responds only to words like "kittens" and "love." A healthy relationship, that one. [Flickr via @Hinchcliffe]