Penis extension surgery is a booming business in the UK and we have exclusive access to a clinic that promises to make your manhood wider and longer for £7,000. Truck driver Leon is about to go under the knife for a second time to get an even bigger penis, something his girlfriend says is unnecessary. We also meet Michael who thinks he would have had more successful relationships if he’d been more confident about his body, that’s why he’s about to put himself through penis extension surgery at the ripe old age of 64.

• Documentary