This article is missing information about men’s clothing, education, family lives, history, and work. Please expand the article to include this information. Further details may exist on the talk page. A man with a man valentine’s day bouquet, wearing a checkered shirt, with his arms crossed.

A man is an adult male human. Throughout human history, traditional gender roles have often defined and limited men’s activities and opportunities. Trans men have a gender identity that does not align with their female sex assignment at birth, while intersex men may have sex characteristics that do not fit typical notions of male biology. Karyogram of a human male using Giemsa staining. Human males typically possess an XY combination. In humans, sperm cells carry either an X or a Y sex chromosome.

For men, primary sex characteristics include the penis and testicles. Adult humans exhibit sexual dimorphism in many other characteristics, many of which have no direct link to reproductive ability. Humans are sexually dimorphic in body size, body structure, and body composition. Men tend to be taller and heavier than women, and adjusted for height, men tend to have greater lean and bone mass than women, and lower fat mass. Photograph of an adult male human, with an adult female for comparison.