About half (54%) of adolescents age 15-19 have had some type of sexual experience. (https://www.sciencedirect.com/science/article/pii/S2590151621000113?via%3Dihub)
Never-married adults report engaging in sexual relations approx. 14 times per year more than married adults. (https://www.researchgate.net/publication/314273096_Declines_in_Sexual_Frequency_among_American_Adults_1989-2014)
Single Americans over 45 engage in sexual relations more than married ones. (https://www.aarp.org/relationships/love-sex/info-05-2010/2009-aarp-sex-survey.html
By 2008 a CDC study estimated that one in four (26 percent) young women between the ages of 14 and 19 in the United States -- or 3.2 million teenage girls -- was infected with at least one of the most common sexually transmitted diseases (human papillomavirus (HPV), chlamydia, herpes simplex virus, and trichomoniasis). (https://www.sciencedaily.com/releases/2008/03/080312084645.htm) And note that only 33%of women even between age 20-34 are married.
In 2017 it was estimated that about 45 percent of U.S. men and women were infected with the cancer-causing human papillomavirus (HPV sexually transmitted disease - the most common sexually transmitted disease among men and women in the United States. Among women, the prevalence of HPV infection drops to about 22 percent as they age, but it remains high among men. (https://www.webmd.com/sexual-conditions/hpv-genital-warts/news/20170119/nearly-half-of-us-men-infected-with-hpv-study-finds)
Since 2000, rates of P&S syphilis have increased among men, primarily attributable to increases in cases among MSM. Similar to past years, in 2018, MSM accounted for the majority (53.5%) of all reported cases of P&S syphilis and, of these, 41.6% were known to be living with diagnosed HIV. Although rates of P&S syphilis are lower among women, rates have increased substantially in recent years, increasing 30.4% during 2017–2018 and 172.7% during 2014–2018, suggesting a rapidly growing heterosexual epidemic.
In 2000 and 2001, the national rate of reported primary and secondary (P&S) syphilis cases was 2.1 cases per 100,000 population, the lowest rate since reporting began in 1941 (Figure 35, Table 1).
However, the P&S syphilis rate has increased almost every year since 2001. This rise in the rate of reported P&S syphilis has been primarily attributable to increased cases among men and, specifically, among gay, bisexual, and other men who have sex with men (MSM). MSM account for the majority of P&S syphilis cases and estimated rates are substantially higher among MSM compared with women or men who have sex with women only (MSW). 5 The number of cases among MSM has continued to increase, but within the last five years, cases among MSW and women have increased substantially as well. The increase in syphilis among women is of particular concern because it is associated with a striking and concurrent increase in congenital syphilis.
Centers for Disease Control and Prevention: STD Surveillance 2018 National Profile 27 West, and 7.2% in the Northeast (Table 29). Among women, the largest increases were observed in the West (41.2%), followed by the Northeast (40.0%), the South (30.8%) and the Midwest (30.8%) (Table 28). MSM continued to account for the majority of P&S syphilis cases in 2018 (Figures 39 and 41).
Of 35,063 reported P&S syphilis cases in 2018, 18,760 (53.5%) were among MSM, including 16,905 (48.2%) cases among men who had sex with men only and 1,855 (5.3%) cases among men who had sex with both men and women (Figure 39)....
Among the 24,176 male cases with information on sex of sex partners, 77.6% occurred among MSM. A total of 36 states were able to classify at least 70.0% of reported P&S syphilis cases as MSM, MSW, Centers for Disease Control and Prevention: STD Surveillance 2018 National Profile 27 West, and 7.2% in the Northeast (Table 29).
Among women, the largest increases were observed in the West (41.2%), followed by the Northeast (40.0%), the South (30.8%) and the Midwest (30.8%) (Table 28). MSM continued to account for the majority of P&S syphilis cases in 2018 (Figures 39 and 41). Of 35,063 reported P&S syphilis cases in 2018, 18,760 (53.5%) were among MSM, including 16,905 (48.2%) cases among men who had sex with men only and 1,855 (5.3%) cases among men who had sex with both men and women (Figure 39).
Overall, 5,416 (15.4%) cases were among MSW, 4,995 (14.2%) were among women, 5,858 (16.7%) were among men without information about sex of sex partners, and 34 (0.1%) were cases reported with unknown sex. Among the 24,176 male cases with information on sex of sex partners, 77.6% occurred among MSM. A total of 36 states were able to classify at least 70.0% of reported P&S syphilis cases as MSM, MSW, or women each year during 2014– 2018 (Figure 41). In these states, during 2017–2018, the number of cases increased 5.3% among MSM, 16.3% among MSW, and 32.9% among women.
Among 2018 P&S syphilis cases with known HIV status, 41.6% of cases among MSM were HIV-positive, compared with 7.9% of cases among MSW, and 4.0% of cases among women.
When examining reported P+S syphilis cases over time, 36 states were able to classify at least 70% of reported P+S syphilis cases as MSM, MSW, or women each year during 2014–2018. In these states, cases among MSM increased 5.3% during 2017–2018 and 51.5% during 2014– 2018 (Figure 41).
Among males, 610,447 cases of chlamydia were reported in 2018 for a rate of 380.6 cases per 100,000 males (Table 5). The rate of reported cases among males increased each year during 2000–2018, with the exception of 2012–2013, when rates remained stable (Figure 1). During 2017–2018 alone, the rate among males increased 5.7%; during 2014–2018, rates of reported cases among males increased 37.8% (Tables 4 and 5). This pronounced increase among males could be attributed to either increased transmission or improved case identification (e.g., through intensified extra-genital screening efforts) among gay, bisexual, and other men who have sex with men (MSM).
Despite this considerable increase in males, the rate of reported chlamydia cases among females was still about two times the rate among males in 2018, likely reflecting a larger number of females screened for this infection.
More.
Funny how “sodomite” got transmogrified into “MSM”.