Friends with (erection size) benefits? Erect penis size versus type of partner

[dropcap]Y[/dropcap]ou may have previously read on Statgasm! how much I enjoy the 2014 study led by Debby Hebernick on erect penis dimensions. If you need a reminder, check out my previous post here. I’ve also mentioned more than a few times how the researchers did the world a great service by carving up their robust erect penis data like a thanksgiving turkey. Their thorough data stratification has provided several unique insights into the erect penis. The Hebernick study had 1,661 men self-measure their erect penis length, circumference and record several additional items including how they obtained their erection and if there was someone present, the nature of their relationship. A summary of the data is shown below.




The men that measured their erect penis with a someone other than a sexual partner (e.g. a friend) present reported a mean erect penis length of 16.0 cm (6.3″), which was significantly longer than the men who were alone or with a sexual partner. Circumference was also larger but not enough to be statistically significant.

I don’t really know what to make of these results; the researchers offer no explanation in their paper.  It could be a small sample size anomaly, as only 16 out of 1,661 men reported measuring their erection with a non-sexual partner present. Or maybe it’s that guys who are comfortable pulling out their erect Johnsons in front of their friends have large penises. That makes a lot of sense to me.


Herbenick, D., Reece, M., Schick, V. and Sanders, S. A. (2014), Erect Penile Length and Circumference Dimensions of 1,661 Sexually Active Men in the United States. J Sex Med, 11: 93–101.

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