I found this article by an evolutionary biologist. Notice the part about the future of human penis size.
Human race will 'split into two different species' | the Daily Mail
This would indicate that women are evolutionarily programmed to select men with larger penises causing it to develop in size over time. Finally, a scientific answer to the age long question: "does size matter?".
Human race will 'split into two different species' | the Daily Mail
This would indicate that women are evolutionarily programmed to select men with larger penises causing it to develop in size over time. Finally, a scientific answer to the age long question: "does size matter?".