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  2. Adolescence - Wikipedia

    en.wikipedia.org/wiki/Adolescence

    Upper body of a teenage boy. The structure has changed to resemble an adult form. Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity. The average age of onset of puberty is 10—11 for girls and 11—12 for boys.

  3. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    Five Tanner stages of male genitalia; The Adolescent Period. In males, testicular enlargement is the first physical manifestation of puberty (and is termed gonadarche). [30] Testes in prepubertal males change little in size from about 1 year of age to the onset of puberty, averaging about 2–3 cm in length and about 1.5–2 cm in width.

  4. Adolescent sexuality in the United States - Wikipedia

    en.wikipedia.org/wiki/Adolescent_sexuality_in...

    Boys who are victims of sexually predatory teenage girls can also be devastated. Sexually-predatory girls will ask a boy, particularly a sexually-naive boy, for photos, and "he's sort of flattered and he feels like a big guy and then she sends them around." [91] Unbeknownst to them at the time, their compliance can cause lasting harm.

  5. Tanner scale - Wikipedia

    en.wikipedia.org/wiki/Tanner_scale

    The Tanner scale (also known as the Tanner stages or sexual maturity rating ( SMR )) is a scale of physical development as children transition into adolescence and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts, genitals ...

  6. Pederasty - Wikipedia

    en.wikipedia.org/wiki/Pederasty

    Pederasty. Pederasty or paederasty ( / ˈpɛdəræsti /) is a sexual relationship between an adult man and a boy. It was a socially acknowledged practice in Ancient Greece and Rome and elsewhere in the world, such as Pre-Meiji Japan . In most countries today, the local age of consent determines whether a person is considered legally competent ...

  7. Adolescent sexuality - Wikipedia

    en.wikipedia.org/wiki/Adolescent_sexuality

    Adolescent sexuality is a stage of human development in which adolescents experience and explore sexual feelings. Interest in sexuality intensifies during the onset of puberty, and sexuality is often a vital aspect of teenagers' lives. [ 1] Sexual interest may be expressed in a number of ways, such as flirting, kissing, masturbation, or having ...

  8. Preadolescence - Wikipedia

    en.wikipedia.org/wiki/Preadolescence

    Preadolescence is a stage of human development following middle childhood and preceding adolescence. [ 1] It commonly ends with the beginning of puberty. [ 2] Preadolescence is commonly defined as ages 9–12 [ 3] ending with the major onset of puberty. It may also be defined as simply the 2-year period before the major onset of puberty. [ 4]

  9. Boy - Wikipedia

    en.wikipedia.org/wiki/Boy

    A boy's muscles increase in size and mass, his voice deepens, his bones lengthen, and the shape of his face and body changes. [21] The increased secretion of testosterone from the testicles during puberty causes the male secondary sexual characteristics to be manifested. [22] Male secondary sex characteristics include: Adolescent boys in Uruguay