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At what age do men deceive the most?

Studies all agree that infidelity in France is constantly on the rise, and that men are more unfaithful than women. But the latter disagree on the age of the passage to the act. So, at what age do men deceive the most?

French study

In general, infidelity is difficult to study because it is complex for researchers to find participants willing to respond in good faith, and therefore to collect accurate data. The different studies are therefore all to be taken with hindsight. (At what age do men deceive the most)

According to Ipsos, the French polling institute, the older the man gets, the more his infidelity curve increases: we are around 40% for the 18-34 age group, we pass the 50% limit for the 35-49 age group, and beyond the fifties, we even reach 65%!


This increase can be explained by the fact that over the years there are simply more opportunities to be unfaithful. A study by our American colleagues seems to validate this theory by placing the peak of infidelity at the age of 55.

At what age do men deceive the most

American study (At what age do men deceive the most)

However, an academic study, which is based on a sample of adherents to the American adulterous dating site “Ashley Madison” contradicts these data, by publishing a graph showing the age distribution of male members:

How to propose to him to live together?

There is a sharp increase at the age of 33,and a decrease as age progresses. The peaks of infidelity are seen here in the years preceding a new decade: at 29, at 39, at 49. 

These men are probably looking to reassure themselves about their power of seduction before passing a milestone in their lives: the midlife and fifties crisis would not be just a myth! 

This theory, which confirms the risk of ages preceding a new decade, is supported by a study by the English site “IllicitEncounters” (also specialized in extra-marital encounters). (At what age do men deceive the most)


Be careful though: not all unfaithful men are registered on extra-marital dating sites, and not all those registered on these sites have necessarily taken action.

And it must also be taken into account that, regarding the studies of extra-marital dating sites, the figures can be distorted by the fact that some users do not hesitate to lie about their ages when registering.

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