Research breaks down average penis size, what influences growth, and what studies say about size and sexual satisfaction.

Editor’s note: This article has been updated to include more information about when the data was collected and where it was originally reported. It’s a stiff competition. A team of researchers alleged ...

Some good news, guys: A new analysis of penis sizes will help reassure most of you that you're normal, researchers say. Many males worry about their penis size, even when there's no cause for concern.