sentence: Some penises grow more when they get hard than other penises.
sentences_before: The length and thickness of the penis is different for different men.
sentences_after: In most cases, whether a penis is big or small, it can still be used for sex. It averages out to be around 3 to 6 inches long when not erect.
concept_name: penis
headings: Penis Penis size in humans
categories: Anatomy of the male reproductive system