How does US people have sex ? Follow 
This work, published in 2016 in the National health statistics reports, provides US national estimates of sexual behavior, sexual attraction, and sexual orientation among women and men aged 18-44 in the United States, based on the 2011-2013 National Survey of Family Growth (NSFG).
Here are the main results: “Regarding opposite-sex sexual behavior, 94.2% of women and 92.0% of men aged 18-44 had ever had vaginal intercourse; 86.2% of women and 87.4% of men had ever had oral sex; and 35.9% of women and 42.3% of men had ever had anal sex. Almost three times as many women (17.4%) reported any same-sex contact in their lifetime compared with men (6.2%) aged 18-44. Feelings of attraction "only to the opposite sex" were more common for men (92.1%) compared with women (81.0%) aged 18-44.”
This work supports what has been observed for several years: oral sex is widespread, anal sex is more and more practiced, homosexual tendencies are significantly more developed in women than in men. Data from other works studying European adults are quite similar.
The link to the scientific abstract of the present article: https://www.ncbi.nlm.nih.gov/pubmed/26766410
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