While research has been conducted on a variety of men's sexual health issues, including lifetime sexual behaviors, limited information exists examining the sexual repertoire of gay and bisexually identified men particularly data from a specific sexual event. This study sought to document the sexual behaviors that gay and bisexually identified men report during their most recent male partnered sexual event, and describe the situational characteristics and participant's evaluation of that event. Data were collected via an internet survey from 24,787 18-87 year old gay and bisexual identified men from 50 U.S. states and the District of Columbia. Measures included sociodemographics, recent/lifetime sexual behavior history, situational characteristics, condom use, and items related to arousal and pleasure. Participants' median age was 39.0 years; ethnicities included white (84.6%), Latino (6.4%) and African American (3.6%), and most men (79.9%) identified as homosexual. The most commonly reported behavior was kissing a partner on the mouth (74.5%), followed by oral sex (72.7% and partnered masturbation (68.4%). Anal intercourse occurred among less than half of participants (37.2%) and was most common among men ages 18-24 (42.7%). Age (p ≤ 0.001), race/ethnicity (p ≤ 0.001), and partner status (p ≤ 0.001) were all significantly related to the likelihood of condom use during men's most recent penile-anal intercourse with another man. The number of behaviors engaged in during last sex varied with most events (63.2%) including 5-9 different sexual behaviors. These data provide one of the first examinations of sexual behaviors during the most recent male partnered sexual event among gay and bisexually identified men in the U.S. Findings from this study suggest gay and bisexually identified men have a diverse sexual repertoire and that partnered sexual behaviors are not limited solely to acts of penile insertion.