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Introduction.  Despite a demonstrated relationship between sexual behaviors and health, including clinical risks, little is known about contemporary sexual behavior.

Aims.  To assess the rates of sexual behavior among adolescents and adults in the United States.

Methods.  We report the recent (past month, past year) and lifetime prevalence of sexual behaviors in a nationally representative probability sample of 5,865 men and women ages 14 to 94 in the United States (2,936 men, 2,929 women).

Main Outcome Measures.  Behaviors assessed included solo masturbation, partnered masturbation, giving and receiving oral sex, vaginal intercourse, and anal intercourse.

Results.  Masturbation was common throughout the lifespan and more common than partnered sexual activities during adolescence and older age (70+). Although uncommon among 14‐ to 15‐year olds, in the past year 18.3% of 16‐ to 17‐year …