Recent studies suggest the figure is around 20 per cent for men and a little over 15 per cent for women.
Discreet: The survey found that overall 89 per cent of straying spouses never get found out (file pic)
Dr Holmes says: ‘Women are better liars because they’re more psychologically sophisticated.
‘Emotionally they make plans and have strategies, while men are more impulsive.
‘The biggest difference is that women are much better at keeping their affairs secret.
‘If you look at the studies into paternity, even conservative figures show that between eight and 15 per cent of children haven’t been fathered by the man who thinks he’s the biological parent.’
Emily Pope of Undercover Lovers, which has more than 650,000 members, said: ‘Many of our members, both male and female, have been philandering for years without being caught.
‘Studies have shown that women are actually better liars than men, so it’s not surprising that female adulterers are better at getting away with it than their male counterparts.