Sexual Intercourse is sex between a man and a woman, it is also known as heterosexual sex. Primarily it is the insertion of the
penis into the vagina, also known as vaginal intercourse. Sexual Intercourse is often shortened to simply sex or intercourse.
Men and
women have Sexual Intercourse for sexual
pleasure, love, and/or reproduction. Only Sexual Intercourse between a male and a female can lead to sexual reproduction. Thus, Sexual Intercourse is essential to the continued survival of humans, and the vast majority of animal species.