that their female partner had experienced orgasm, about 85%, and women's self-reporting of 64%. The NSSHB has been supported by funding from Church and Dwight, maker of Trojan condoms. The sponsor offered limited input on the survey development, mostly with respect to gathering information on how often Americans use condoms, settling with a formulation which requested information on whether condoms were used or not during the last 10 sexual encounters of each respondent. With respect to condom use results were encouraging especially with respect to teenagers. Ethnic populations impacted by HIV/AIDS showed a higher rate of condom use than then general population as did dating adults. Discrepancies remain between the level of condom use considered optimal for public health and reported rate of use particularly by people over 40. Women reported less satisfaction with sexual activity than men with less pleasure, less arousal, and fewer orgasms. This was hypothesized by one of the researchers as being related to the greater incidence of pain also reported by women. In the 2012 NSSHB, researchers found that pain during vaginal intercourse was reported by 30% of women and 7% of men. Additionally, pain during anal intercourse was reported by 72% of women and 15% of men. In a publication from the 2016, the researchers found that although most sexually active adults between ages 18 and 50 were aware that Zika could be transmitted by mosquitos, only about 40% identified sexual intercourse as a possible route of transmission. In a 2018 NSSHB publication, it was found that about 60% of Americans who reported on a recent sexual event reported having ejaculated somewhere outside of the vagina at least once. Looking at the most recent sexual event, findings showed a lack of concordance between the percentage of people indicating they used "withdrawal" at their most recent sexual event compared with where they said they ejaculated. Notes External links Center for Sexual Health Promotion National Survey of Sexual Health and Behavior Website (includes free download of the special issue of The Journal of Sexual Medicine) The Journal of Sexual Medicine "Condom Use Is Highest for Young, Study Finds" article by Roni Caryn Rabin in The New York Times October 4, 2010 "Sex in America" season 2, episode 4 of "Curiosity" on Discovery which documentary presents the results of this study. Human sexuality Intimate relationships Surveys (human research)