The study aimed to investigate why humans may have evolved to have larger appendages compared to other primates.

In males, the testicles, scrotum, and penis grow in size during puberty. Researchers say the average size of an erect adult penis is 5.1 to 5.5 inches in length, but that is just an average, and teens ...

If you have ever been concerned about your penis size, you're not alone. The size of the male sex organ has long been thought to be an indicator of a person's testosterone levels and sexual abilities.

Keersten Fitzgerald does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...