Is Penis Size Related to Infidelity?

large penis infidelity

large penis infidelityWe all know the benefits of a larger penis — both direct and indirect. However, could having a larger penis be related to a higher incidence of infidelity in your relationship? A new study says — YES!

Now, you might think I’m talking about you cheating on your significant other, with that impressive bit of manhood in your trousers. But, I’m not.  This new study shows your lady is more likely to cheat on you, if you have a larger penis.


Published in PLOS One, an international, peer-reviewed, open-access, online scientific publication, researchers interviewed 545 married couples from Kenya to determine if there was a relationship between penis size and extra-marital affairs.

  • A 15-inch ruler was provided for the couples to estimate the husband’s erect penis length.
  • Husband and wife were interviewed separately, in private rooms.
  • If measurement discrepancies were found between what the husband and the wife reported, the measurements were averaged.

What they found was pretty interesting.


The researchers found a variety of factors related to a higher incidence of extra-marital affairs, by the wives, within the last six months (6.2% of women admitted to having affairs within the last 6 months). Wives were more likely to cheat in instances of:

  • Domestic violence,
  • Denial of preferred sexual position, or
  • Spouse with a longer erect penis

The researchers concluded:

“Every one inch longer penis increased the likelihood of women being involved in extra-marital partnership by almost one-and-half times. (…) Women associated large penises with pain and discomfort during sex which precludes the enjoyment and sexual satisfaction that women are supposed to feel.”


After reading this study, I think I kept reading the same issue.  It wasn’t that the man had a large penis. It’s that he uses that penis selfishly, resulting in sexual dissatisfaction. That’s where the real problem seems to lie.

From a woman’s perspective, I can say that I don’t care if a man is smaller, average or hung like a horse. The most important thing is that he’s a giving lover that takes into consideration my needs and desires.

If you’re the next Jonah Falcon, kudos to you! But, you better use that thing with care, or you may send your lady into the arms of another, lesser-endowed man!


Although this study had a large sample size, I think it’s important to note that all men were Kenyan. Why is this important?  Africa has some of the largest penis sizes, on average than any other continent. The largest average penis size of 7.1 inches is found in the Congo, for instance. This could mean that the larger men in the study were likely significantly larger than men in other areas of the world. This could be related to the association of larger penis size with pain in the women.

Additionally, there may be cultural differences at play here. As these participants were rural Kenyans (specifically fishermen from Lake Victoria), there may be a more patriarchal mindset, where women’s satisfaction with the sexual relationship is less of a concern. It would be interesting to see this study repeated with a more varied demographic of participants.

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