[bloak]

Most women are not interested in penis size. (Though some are, obviously.)

At a normal nude beach, with all age groups represented, people don't show off an erect penis. (Though there are beaches where that happens.)

Median erect penis length is about 13-14 cm and I don't think there's credible evidence for the median varying much between countries of Europe and North America. (Though there is some evidence for a smaller or larger median in some places outside Europe and North America.)

Does that help? (I'm not an expert but I think I know enough to write what I have just written.)

[hellojesus]

It does to some extent. At least your data is similar to what I've read.

I think the problem is that even if I was one standard deviation above the mean, that's still only about the 68% percentile. So it's expected that 3 of every 10 dudes would be better endowded than me, and I'm sure nude beaches bias in sample towards the more well endowed. So likely I won't be laughed at but won't be a genetic prize, and I'm not sure I'm confident enough (or ever will be) to accept that as public knowledge.