This project aims to investigate the specific factors associated with the wantedness of first sexual experiences among a nationally representative sample of heterosexual young men aged 18-24 years in the 2006-2010 National Survey of Family Growth (NSFG). We will describe wantedness of first intercourse (Unwanted, Wanted, Ambivalent) by sociodemographic characteristics, relationship variables, and contraceptive use at first intercourse. Then, using multinomial logit regression, we will examine the correlates of unwanted or ambivalent (vs. wanted) first intercourse. We hypothesize that unwanted first intercourse among young men will be correlated with lack of contraception use and younger age at sexual debut as well as lower maternal education, increased age of partner and substance use at time of first sex.