 Bacterial STIs, such as chlamydia and gonorrhea, show that rates among women can be three times higher than men in high prevalence areas of the United States, and one-fourth of pregnancies in developing countries and one-half of pregnancies in the United States are unintended.Another social idea of sexuality is the coital imperative.The coital imperative is the idea that for sex to be real, there must be penile-vaginal intercourse.