In the study, Mr Anderson surveyed 120 undergraduate men – both gay and straight. He found that 78 per cent of those with partners cheated, ‘even though they said that they loved and intended to stay with their partner.’

In an interview with the Huffington Post, he says men want to be emotionally monogamous, though their ‘body craves sex with other people somatically.’

For the purpose of raising a family, he says, it’s the emotional – and not the sexual factor – that counts.

He says: ‘Our physical desires don’t die; they just change from our partner to other people…When the sex dies, the relationship has just begun.’