Non-penetrative sex (also known as outercourse, dry sex, and dry humping) is sexual activity without vaginal, anal, or oral penetration, as opposed to intercourse, anal sex, or oral sex (which may or may not be penetrative).
The terms mutual masturbation and frottage are also used, but with slightly different emphases. NPS and outercourse are rather new terms, which is why such practices are sometimes still called "intercourse".
The term "outercourse" is something of a misnomer, as it contrasts "outer" with "inter" but the "inter" in "intercourse" means "between two people". It does not describe being inside or outside of the body.
It is less likely that bodily fluids will be exchanged, and so outercourse is often considered a practice of safer sex, as well as of birth control . Outercourse in preparation for intercourse can form part of foreplay.
- Axillary intercourse (slang: bagpiping, in reference to the underarm manner in which bagpipes are played; "directing traffic", or "pit-wank", a variant of the term "tit-wank") is a sexual variant where the penis is inserted in the other person's armpit.
- Erotic massage, rubbing all over, with or without oil. May be intensified when combined with deep breathing.
- Handjob, stimulating the penis with the hand.
- Footjob, stimulating genitals with the feet.Frot, penile rubbing.
- Intercrural sex, also known as interfemoral intercourse, which is a type of irrumation, where one partner places a phallic object or penis between the other partner's thighs.
- Intergluteal sex, which is a type of irrumation, where one partner places a phallic object or penis into the other partner's buttock cleavage or gluteal cleft.
- Mammary intercourse, when one partner rubs a phallic object or penis between the partner's breasts.
- Oral stimulation of nipples.
- Sumata, type of stimulation of male genitals popular in Japanese brothels.
- Tribadism, vulval-vulval rubbing, also known as "scissoring.
- Virtual sex, mutual masturbation at a distance with the aid of technology.

