Practice

 Stimulation factors

Sexual intercourse is  usually defined as penile-vaginal penetration. The term sex and the phrase "having sex" commonly mean any sexual activity – penetrative and non-penetrative. 

Anal and oral sex may be regarded as sexual intercourse, but they, as well as non-penetrative sex acts, may also be regarded as maintaining "technical virginity" or as "outercourse," regardless of any penetrative aspects. Heterosexual couples often engage in these practices not only for sexual pleasure, but as a way of avoiding pregnancy and maintaining that they are virgins because they have not yet engaged in penile-vaginal sex. Lesbians may regard oral sex or fingering as loss of virginity, and may also regard tribadism as a primary form of sexual activity

Sexual activity can encompass a number of sexual behaviors, including different sex positions or the use of sex toys. Foreplay may precede particular sexual activities, and often leads to sexual arousal of the partners, resulting in the erection of the penis or (usually) natural lubrication of the vagina.


During intercourse, the partners move their hips to move the penis backward and forward inside the vagina to cause friction, typically without fully removing the penis. In this way, they stimulate themselves and each other, often continuing until orgasm in either or both partners is achieved. For females, stimulation of the clitoris plays a significant role in sexual activity; 70–80% require direct clitoral stimulation to achieve orgasm, though indirect clitoral stimulation (for example, via vaginal intercourse) may also be sufficient (see orgasm in females) As such, some couples may engage in the woman on top position or the coital alignment technique, a technique combining the "riding high" variation of the missionary position with pressure-counterpressure movements performed by each partner in rhythm with sexual penetration, to maximize clitoral stimulation.

Oral sex consists of all the sexual activities that involve the use of the tongue, rest of the mouth and throat to stimulate genitalia. It is sometimes performed to the exclusion of all other forms of sexual activity, and may include the ingestion or absorption of semen or vaginal fluids. Fingering is the manual (genital) manipulation of the clitoris, vulva, vagina, or anus for the purpose of sexual arousal and sexual stimulation. It may constitute the entire sexual encounter or it may be part of mutual masturbation, foreplay or other sexual activities.