Men and women view their own bodies differently after having sex for the first time. According to research led by Sara Vasilenko, when college-aged men lose their virginity, they become happier with their looks, whereas college-aged women become less happy with their looks after having sex.
Vasilenko, S. A., Ram, N., & Lefkowitz, E. S. (2011). Body image and first sexual intercourse in late adolescence. Journal of Adolescence, 34, 327-335.