Organisms of many species are specialized into male and female varieties, each known as a sex. The gametes produced by an organism define its sex: males produce small gametes e. Individual organisms which produce both male and female gametes are termed hermaphroditic. Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes. Among humans and other mammals , males typically carry an X and a Y chromosome XY , whereas females typically carry two X chromosomes XX , which are a part of the XY sex-determination system.
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Genetic Mechanisms of Sex Determination
Sex - Wikipedia
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Defining sexual health
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Sex addiction the compulsive sexual behavior described here should not be confused with disorders such as pedophilia or bestiality. For some people, sex addiction can be highly dangerous and result in considerable difficulties with relationships. Some report that it may manifest itself as a compulsive need to masturbate, view pornography, or be in sexually stimulating situations. A person with sex addiction may significantly alter their life and activities in order to perform sexual acts multiple times a day and are reportedly unable to control their behavior, despite severe negative consequences.
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