Non-penetrative sex or outercourse is sexual activity that usually does not include sexual penetration , but some forms, particularly when termed outercourse , include penetrative aspects, that may result from forms of fingering or oral sex. People engage in non-penetrative sex for a variety of reasons, including as a form of foreplay or as a primary or preferred sexual act. Although sexually transmitted infections STIs such as herpes , HPV , and pubic lice can be transmitted through non-penetrative genital -genital or genital-body sexual activity, non-penetrative sex may be used as a form of safer sex because it is less likely that body fluids the main source of STI transmission will be exchanged during the activities, especially with regard to aspects that are exclusively non-penetrative.
While non-penetrative sex or outercourse is usually defined as excluding sexual penetration, [ 4 ] [ 5 ] [ 6 ] some non-penetrative sex acts can have both non-penetrative and penetrative components and may therefore still be categorized as non-penetrative sex. Oral sex, for example, which can include oral caress of the genitalia , as well as penile penetration of the mouth or oral penetration of the vagina, may be categorized as non-penetrative sex.
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The words penetration and penetrative may be restricted to penile-vaginal penetration, and, in this way, the definition of outercourse additionally includes penetrative anal sex, with the term outercourse used to contrast the term sexual intercourse as vaginal sex. The term heavy petting covers a broad range of foreplay activities, typically involving some genital stimulation, but not the direct act of penetrative sexual intercourse.
Frottage is the general term for the act of rubbing any part of the body, including the buttocks, the breasts, abdomen, thighs, feet, hands, legs and sexual organs against the sexual organ of another person; this is done whether naked or clothed and is more commonly known as dry humping or dry sex.
Couples may engage in frottage as a form of foreplay or simply as a method to achieve sexual gratification without the penetrative aspects of vaginal, anal or oral sex, which may also be their personal way of preserving virginity [ 7 ] [ 8 ] or their way of practicing safer sex. Manual sex sometimes called manual intercourse [ 24 ] involves the use of one's hands or fingers to stimulate the genitals of another person. Manual sex may be used as foreplay [ 30 ] or as a physically intimate act in its own right.
