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Male impotence, similar in meaning to the modern term of erectile dysfunction, was initially advanced by the discovery of papaverine in the 1980s by urologist Ronald Virag. [14] Although referring to the same symptoms, impotence was considered to have psychogenic causes, whereas erectile dysfunction was considered to have organic causes. [ 14 ]
The sexual self-concept of girls with more negative views are highly influenced by other people; those of girls who hold more positive views are less so. [61] Boys are less willing to state they have negative feelings about sex than girls when they describe their sexual self-schemas. [65]
Overall, 68 pregnancies occurred per 1,000 girls aged 15–19 in 2008. Nearly 7% of 15–19-year-old girls become pregnant each year. Pregnancies are much less common among girls younger than 15. In 2008, 6.6 pregnancies occurred per 1,000 teens aged 14 or younger. In other words, fewer than 1% of teens younger than 15 become pregnant each year ...
Alfred Kinsey and colleagues at Indiana University had previously published two volumes on sexual behavior in the human male and female (known as the Kinsey Reports), in 1948 and 1953 respectively, both of which had been revolutionary and controversial in their time. Kinsey's work, however, had mainly investigated the frequency with which ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 9 February 2025. Scientific study of human sexuality For the magazine, see Sexology (magazine). Sexual orientation Sexual orientations Asexual Bisexual Heterosexual Homosexual Related terms Allosexuality Androphilia and gynephilia Bi-curious Gray asexuality Demisexuality Non-heterosexual Pansexuality ...
High school students are having less sexual intercourse. For years, studies have shown a decline in the rates of American high school students having sex. The study found that 30% of teens in 2021 ...
Complete androgen insensitivity syndrome causes a genetic male to have a vagina (often incompletely developed, nearly always blind-ending), breasts, and a clitoris; people with this form are raised as females. [25] Aphallia – a rare condition where a XY male is born without a penis. As of 2017, only 100 cases have been reported in literature ...
For Justin Lehmiller’s book, Tell Me What You Want: The Science of Sexual Desire and How It Can Help Improve Your Sex Life, he conducted a survey and found that 58% of men fantasized about ...