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The variation in penis size across different regions and countries.
Medical research finds the global average erect penis length in the mid‑5‑inch range (about 13.1 cm), and studies that try to break those averages down by race or country report only small, inconsiste...
Genetics are the single strongest predictor of penis size, but they interact with hormones, developmental health and environmental exposures so that “bigger” is rarely reducible to a single gene or si...
Reported cross‑national differences in average are shaped as much by who measures and how as by biology: large meta‑analyses find smaller, more uniform global averages than pop culture implies, but co...