Why junk food really is addictive. (Telegraph UK)

Professor Kessler, ex-commissioner of the US Food and Drug Administration (FDA), claims that manufacturers have created combinations of fat, sugar and salt that are so tasty many people cannot stop eating them even when full.

He argues that manufacturers are seeking to trigger a “bliss point” when people eat certain products, leaving them hungry for more.

“It is time to stop blaming individuals for being overweight or obese,” he said. “The real problem is we have created a world where food is always available and where that food is designed to make you want to eat more of it. For millions of people, modern food is simply impossible to resist.”

While at the FDA, Prof Kessler was well known for his criticism of the tobacco industry, which he accused of manipulating cigarettes to make them even more addictive.

The same can be said about porn.