Ephebophilia is the primary or exclusive adult sexual interest in mid-to-late adolescents, generally ages 15 to 19. The term was originally used in the late 19th to mid 20th century. It is one of a number of sexual preferences across age groups subsumed under the technical term chronophilia. Ephebophilia strictly denotes the preference for mid-to-late adolescent sexual partners, not the mere presence of some level of sexual attraction.
In research environments, specific terms are used for chronophilias: for instance, ephebophilia to refer to the sexual preference for mid-to-late adolescents, hebephilia to refer to the sexual preference for earlier pubescent individuals, and pedophilia to refer to the sexual preference for prepubescent children. However, the term pedophilia is commonly used by the general public informally,  to refer to any sexual interest in minors below the legal age of consent, regardless of their level of physical or mental development.
The term ephebophilia comes from the Ancient Greek: ἔφηβος (ephebos) variously defined as "one arrived at puberty", "a youth of eighteen who underwent his dokimasia and was registered as a citizen (Athens)", and "arriving at man's estate"; and φιλία (-philia) "love". It has been used by Dutch psychologist Frits Bernard as far back as 1950, and reprinted in 1960 in the gay support magazine Vriendschap under the pseudonym Victor Servatius, crediting the origin of the term to Magnus Hirschfeld with no exact date given. The word was in fact first used in French (éphébophilie), in Georges Saint-Paul's 1896 book, Tares et Poisons: Perversion et Perversité Sexuelles.
The term has been described by Frenchman Félix Buffière in 1980, and Pakistani scholar Tariq Rahman, who argued that ephebophilia should be especially used with regard to homosexuality when describing the aesthetic and erotic interest of adult men in adolescent boys in classical Persian, Turkish, or Urdu literature. The term was additionally revived by Ray Blanchard to denote adults who sexually prefer 15- to 19-year-olds.
Mid-to-late adolescents usually have physical characteristics near (or, in some cases, identical) to that of fully-grown adults; psychiatrist and sexologist Fred Berlin states that most men can find persons in this age group sexually attractive, but that "of course, that doesn't mean they're going to act on it. Some men who become involved with teenagers may not have a particular disorder. Opportunity and other factors may have contributed to their behaving in the way they do".
Ephebophilia is used only to describe the preference for mid-to-late adolescent sexual partners, not the mere presence of some level of sexual attraction. Generally, the preference is not regarded by psychologists as a pathology when it does not interfere with other major areas of one's life, and is not listed by name as a mental disorder in the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5), the ICD-10, or as a paraphilia. However, the preference can sometimes be diagnosed as a disorder if it results in dysfunction or exploitative behavior, under the DSM specification 309.2, "Paraphilia Not Otherwise Specified".
Researchers state that hebephilia, erotic interest which centers on young pubescents, has not come into widespread use, even among professionals who work with sex offenders, and may have been confused with the term ephebophilia, which denotes a preference for older adolescents. It is concluded that "few would want to label erotic interest in late — or even mid — adolescents as a psychopathology, so the term hebephilia may have been ignored along with ephebophilia".
- Age disparity in sexual relationships
- Cougar (slang)
- Fear of youth
- Twink (gay slang)
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- The dictionary definition of ephebophilia at Wiktionary