Entrepreneurial inventor, Elon Musk, has developed a device that can be clipped to the underside of a toilet seat that will deliver a powerful but non-fatal electric shock to people who spend unnecessary time on the toilet

The Zap-A-Butt can be triggered automatically when somebody sits on the toilet seat or can be operated manually by a person waiting outside who considers that the occupant has spent far too long hogging the smallest room.

The device will deliver an initial jolt of 40 volts but this will be increased to a short series of 100-volt hits if the recipient fails to respond to the initial advisory shock.

The device carries a warning that men who habitually take a newspaper into the toilet run the risk of having it bursting into flames as the current surges through their body.