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impotence
impotence , inhibited sexual excitement in a man during sexual activity that, despite an unaffected desire for sex, results in inability to attain or maintain a penile erection. Known medically as male erectile dysfunction, it affects younger and older men alike. Impotence can result from... Read more |
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pedophilia
pedophilia psychosexual disorder in which there is a preference for sexual activity with prepubertal children. Pedophiles are almost always males. The children are more often of the opposite sex (about twice as often) and are typically 13 years or age or younger; they may be within or outside the... Read more |
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Sex characteristics
secondary sexual characteristics External features of a sexually mature animal that, although not directly involved in copulation, are significant in reproductive behaviour. The development of such features is controlled by sex hormones (androgens or oestrogens); they may be seasonal (e.g. the... Read more |
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chastity
chastity A confusion of the terms ‘chastity’ and ‘celibacy’ has long existed. ‘Chastity’ — deriving from the Latin ‘castitas’, meaning ‘cleanliness’ or ‘purity’ — does not necessarily mean the... Read more |
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secondary sexual character
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sexual division of labour
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Sexual orientation
Sexual Orientation Sexual orientation is defined by the sex of those to whom a person is attracted. In most societies, people are classified as homosexual, heterosexual, bisexual, or asexual. Heterosexual is the term applied to those attracted to the other sex; homosexual covers those attracted to... Read more |
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Sexual Abuse
SEXUAL ABUSE Illegal sex acts performed against a minor by a parent, guardian, relative, or acquaintance. Sexual abuse is a general term for any type of sexual activity inflicted on a child by someone with whom the child is acquainted. It is considered an especially heinous crime because the... Read more |
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sexually transmitted disease
sexually transmitted disease (STD) or venereal disease, term for infections acquired mainly through sexual contact. Five diseases were traditionally known as venereal diseases: gonorrhea , syphilis , and the less common granuloma inguinale, lymphogranuloma venereum, and chancroid. In the... Read more |
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Fitness
Fitness Fitness is a central concept of evolutionary biology. We will consider individual fitness, followed by fitness as applied to alleles or genotypes. The direct fitness of an individual is related to the number of offspring that that individual produces. Specifically,... Read more |
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