Sexuality is about the act of mating. Humans do not have sex simply in order to reproduce. We also have sex to enjoy sexual intimacy (recreation) and to form the emotional bonds that keep couples committed to each other over the years needed to support a family (deferred reproduction).
For most animals, a male fertilises a female by making a quick insertion. Only mammals employ an extended thrusting technique. There is no obvious advantage to this extra time needed for the mating process. This inefficiency is no doubt due to the pleasure the male obtains from thrusting.
Intercourse refers to interaction between two or more people. The strict definition of ‘sexual intercourse’ is any activity engaged in with a lover (as opposed to masturbatory activity alone). Sexual intercourse is often equated with vaginal intercourse, so the term ‘coitus’ is used. To ‘have sex’ means to ‘engage in sexual activity with a lover’. For heterosexuals, sex equates to intercourse (the penis penetrates the vagina and thrusts until male orgasm and ejaculation). Any other activity is described as ‘foreplay’.
Mammals use rear entry but the default position used by heterosexuals in so-called civilised countries is the missionary position, which allows:
- a man to control the stimulation he enjoys from thrusting;
- a woman to focus on the upper body lovemaking aspects; and
- a man to observe a woman’s response, which leads to faking.
We can differentiate between three distinct categories of sexual activity. First there are manual contacts where we use our hands (or fingers) to stimulate (massage) the sex organ (called masturbation). Masturbation can also be used with a lover but less commonly to the point of orgasm. Any activity short of intercourse itself, is called ‘petting’, which was popular in the days before the availability of reliable contraception. When followed by intercourse petting is more commonly called ‘foreplay’ today.
Secondly there are oral contacts where we use our mouth or tongue to kiss or stimulate (by licking, sucking or kissing) the sex organ (called oral sex) or other parts of the body. Oral sex performed on a man (called fellatio) is much more common than oral sex performed on a woman (called cunnilingus). Cunnilingus is associated with lesbians and pornography.
Thirdly there are genital contacts where a man penetrates a lover’s body (called intercourse or penetrative sex) with an erect penis. Vaginal intercourse involves a man’s penis penetrating a woman’s vagina. Heterosexuals and, more commonly, homosexual men engage in anal intercourse (also called anal sex) where an erect penis penetrates a lover’s anus. Anyone may use a dildo or vibrator to penetrate a lover’s vagina or anus. Women can use strap-on dildo to penetrate a lover (called pegging).
We can differentiate between three approaches to intercourse. The vast majority of intercourse is defined by a man’s sex drive. A man holds his erect penis between his lover’s legs to find the entrance to her vagina. The man then thrusts rhythmically into her vagina as the woman kisses or caresses him allowing him the time he needs to ejaculate. Compared with foreplay, intercourse involves a woman in the least effort. A woman only needs to allow a man to penetrate her vagina and thrust until ejaculation.
Secondly there is intercourse that is preceded by ‘foreplay’. Foreplay is typically provided by the man. Research indicates that men with a creative imagination tend to enjoy eroticism, fantasy, masturbation and foreplay more than others. Men’s enjoyment of eroticism (male turn-ons) may be the result of the increased complexity of the brain. Other men (especially when young) prefer to get straight to intercourse rather than indulge in eroticism. Eroticism includes male turn-ons that fall short of intercourse.
Thirdly there is fantasy-style sex as portrayed in erotic fiction that is characterised by the proactive role of the woman. The woman initiates sexual activity, encourages the man to stimulate her and provides facial expressions and vocals that assist with male orgasm. Some women feel obligated to provide at least some of this performance for a lover either because they feel it is expected or to feel better about their sexual role.
It is the constant complaint of married females that their husbands are … primarily concerned with genital stimulation … It is the constant complaint of the married male that his wife … does not tactilely stimulate his genitalia. (Alfred Kinsey 1953)