Human males are one of the two primary biological sexes in the species Homo sapiens. They typically possess XY chromosomes, which influence the development of male physical characteristics, such as increased muscle mass and body hair. Males usually have reproductive organs that include testes, which produce sperm and hormones like testosterone. In many cultures, human males often take on specific social roles and responsibilities, which can vary widely across different societies. These roles may include being providers, protectors, or leaders. Males can also participate in nurturing and caregiving, challenging traditional stereotypes about gender roles.