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Researchers have made repeated calls for a better understanding of normative sexuality development during adolescence and young adulthood. We examined how the occurrence of seven penetrative, nonpenetrative, and contraceptive behaviors changed longitudinally across seven waves, and how individual (gender) and contextual (romantic relationship status) factors related to these changes in a sample of college students (N = 730, M age = 18.4 at Semester 1; 51% female; 26% Hispanic/Latino American, 22% Black/African American, 30% Asian American/Pacific Islander, 45% White/European American). Across college, reported kissing, touching, performing and receiving oral sex, and penetrative sex rates increased, and contraception use (any type) and condom use (in particular) rates decreased, demonstrating changes with age independent of young adults' romantic relationship experiences. Rates of all sexual behaviors were higher, and of contraception use lower, when students were in serious romantic relationships. Contraception use decreased more for men than for women, particularly in semesters men were not in serious relationships. Condom use decreased for men, and for women in semesters they were in serious relationships. Findings demonstrate normative trends in sexuality development, as well as suggesting the value of enhanced sexual health promotion programming, with a particular focus on contraceptive behaviors, across college. [ABSTRACT FROM AUTHOR]

Despite a growing literature on college students’ sexual behaviors, little is known about how sexual behaviors, and their associations with alcohol, differ for college and noncollege attenders, and whether these patterns represent changes during college or an extension of pre‐college behaviors. This paper applied time‐varying effect models to data from the National Longitudinal Study of Adolescent to Adult Health to examine (1) prevalence of four sexual behaviors from ages 14 to 24 and (2) how their association with frequent heavy episodic drinking varied across these ages for college and noncollege attenders. Nonattenders have higher prevalence of all sexual behaviors than college attenders across most ages; however, the association between heavy episodic drinking and sexual behaviors is stronger for college attenders during ages 18–20. [ABSTRACT FROM AUTHOR]

Objectives. To examine the mechanisms of the association between age of sexual initiation and adult health. Methods. Data from the Seattle Social Development Project (n = 808), in Seattle, Washington, included outcomes when participants were in their 30s (2005–2014): substance use disorders, depression, poor health, and obesity. Sexual consequence mediators included sexually transmitted infection, adolescent pregnancy, and a high number of sexual partners. We used linear logistic regression to model main effect and mediated associations. Results. Age of sexual initiation was related to nicotine and marijuana disorders, physical health, and obesity, but not alcohol disorder or depression. Mediated association with nicotine disorder was not significant; association with marijuana disorder was reduced; significant relationships with poor health and obesity remained. Conclusions. The relationship between age of sexual initiation and substance use was largely explained by consequences of sexual behavior. Earlier sexual initiation was linked to poorer physical health outcomes, though the nature of the association remains unclear. Public Health Implications. Prevention approaches need to address multiple risk factors and emphasize contraceptive methods to avoid sexual consequences. For physical health outcomes, broad prevention approaches, including addressing early sexual initiation, may be effective. [ABSTRACT FROM AUTHOR]

Background: Men who have sex with men (MSM) have higher rates of substance use compared to men who have sex with women. Among MSM, drug use is linked to higher-risk sexual behavior and acquisition of HIV and other sexually transmitted infections. Objectives: We hypothesize that time since first acting on one's same sex attraction, or one's “gay age”, could be predictive of drug using behavior. Methods: We examined this question among 176 MSM, aged 18-35, presenting at a public sexual health clinic. Behavioral data were captured using interviewer- and self-administered surveys and clinical data were extracted from medical records. We used modified Poisson regression to examine associations between gay age and recent recreational drug use, and separately, between gay age and recent marijuana use. Results: In total, 43% of participants reported recent marijuana use and 26% of participants reported recent use of other drugs. The associations between gay age and marijuana use and other drug use varied by HIV status. After adjustment for biological age, race, and education, a one-year increase in gay age was associated with significantly increased drug use among HIV-negative men (adjusted prevalence ratio (aPR): 1.08; 95% confidence interval (CI): 1.03-1.14), but we observed no association between gay age and drug use among HIV-positive men (aPR: 0.96, 95% CI: 0.86-1.07). Gay age was not associated with marijuana use in HIV-negative (aPR: 1.00, 95% CI: 0.95-1.04) or HIV-positive (aPR: 1.06, 95% CI: 0.98-1.14) men. Conclusions: In summary, HIV-negative MSM who had experienced more time since first same-sex experience had significantly increased prevalence of recent drug use. [ABSTRACT FROM AUTHOR]