Dan Savage, the sex advice columnist, says: ''We tell people that humans are naturally monogamous and [it's not] true,” he says. ''It's saying that one blow-job on a business trip should be given more weight and consideration and more importance should be attached to it than the 25 years you've spent together, the kids you're raising together, the property you own together, the history you have together, the affection you still have for each other – all of that must be discarded. All of that weighs less on the scales.''

Savage argues that given around 55% of men and 45% of women will cheat in marriage, we need to get past the idea that infidelity should spell the end of marriage.