Tuesday, April 29, 2014

The Larger Your Penis, The More Likely Your Wife Will Cheat (in Kenya)

Irony, that. You can read the abstract for the study below this piece from the Huffington Post (the whole study is open access on PLoS ONE). The good news for American men is that this study involved women married to fishermen along Lake Victoria in Kisumu County, Kenya, so there is likely some cultural and values-based issues that Huffington Post chose not to mention in their provocative title.

See what the HP article does not mention until near the bottom is that penis size ranked third on the list of reasons they women had affairs - domestic violence and being denied a preferred sex position were one and two, respectively.

The Larger Your Penis, The More Likely Your Wife Will Cheat Says New Study

The Huffington Post | by Taryn Hillin
Posted: 04/23/2014

Men often view having a large member as a symbol of strength and sexual prowess. But it turns out, when it comes to keeping a woman satisfied, bigger may not be better.

Contrary to popular belief, a new study out of Kenya found that husbands with larger penises were more likely to be cheated on by their wives (shocking, we know).

For the study -- published this month in PLOS One -- researchers interviewed 545 married couples in Kenya in order to better understand their relationship habits and, more specifically, to identify factors which contributed to women having extramarital affairs.

Researchers asked both partners to self-report the male's erect penis size (they had a 15 inch ruler on hand for reference). Then, if there were differences between the estimates (which there were), they either took the average of the two or went with the estimate from the partner who was less likely to fib.

What they found was rather shocking:

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

In fact, one woman interviewed for the study told the researchers the following: "Some penis may be large yet my vagina is small, when he tries to insert it inside, it hurts so much that I will have to look for another man who has a smaller one [penis] and can do it in a way I can enjoy."

According to the study, 6.2 percent of the 545 females had affairs during the six-month study. Other factors that increased the likelihood of women straying outside the marriage included domestic violence, being denied sex or denied preferred sexual position, being under age of 25 and a lack of sexual satisfaction.

Researchers focused on female infidelity specifically because of the prevalence and spread of HIV among women in the region. Researchers felt if they could identify reasons for unprotected sex, they might better prevent it.
* * * * *

Here is the full abstract - follow the title link to see the whole article (open access).

Full Citation: 
Kwena Z, Mwanzo I, Shisanya C, Camlin C, Turan J, et al. (2014, Apr 18). Predictors of Extra-Marital Partnerships among Women Married to Fishermen along Lake Victoria in Kisumu County, Kenya. PLoS ONE; 9(4): e95298. doi: 10.1371/journal.pone.0095298

Predictors of Extra-Marital Partnerships among Women Married to Fishermen along Lake Victoria in Kisumu County, Kenya

Zachary Kwena, Isaac Mwanzo, Chris Shisanya, Carol Camlin, Janet Turan, Lilian Achiro, Elizabeth Bukusi



The vulnerability of women to HIV infection makes establishing predictors of women's involvement in extra-marital partnerships critical. We investigated the predictors of extra-marital partnerships among women married to fishermen.


The current analyses are part of a mixed methods cross-sectional survey of 1090 gender-matched interviews with 545 couples and 12 focus group discussions (FGDs) with 59 couples. Using a proportional to size simple random sample of fishermen as our index participants, we asked them to enrol in the study with their spouses. The consenting couples were interviewed simultaneously in separate private rooms. In addition to socio-economic and demographic data, we collected information on sexual behaviour including extra-marital sexual partnerships. We analysed these data using descriptive statistics and multivariate logistic regression. For FGDs, couples willing to participate were invited, consented and separated for simultaneous FGDs by gender-matched moderators. The resultant audiofiles were transcribed verbatim and translated into English for coding and thematic content analysis using NVivo 9.


The prevalence of extra-marital partnerships among women was 6.2% within a reference time of six months. Factors that were independently associated with increased likelihood of extra-marital partnerships were domestic violence (aOR, 1.45; 95% CI 1.09–1.92), women reporting being denied a preferred sex position (aOR, 3.34; 95% CI 1.26–8.84) and spouse longer erect penis (aOR, 1.34; 95% CI 1.00–1.78). Conversely, women's age – more than 24years (aOR, 0.33; 95% CI 0.14–0.78) and women's increased sexual satisfaction (aOR, 0.92; 95% CI 0.87–0.96) were associated with reduced likelihood of extra-marital partnerships.

Domestic violence, denial of a preferred sex positions, longer erect penis, younger age and increased sexual satisfaction were the main predictors of women's involvement in extra-marital partnerships. Integration of sex education, counselling and life skills training in couple HIV prevention programs might help in risk reduction.

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