Frottage refers to non-penetrative sex acts that involve rubbing any parts of the body together, such as the buttocks, breasts, abdomen, thighs and genitals. Frottage can also be a form of masturbation that involves rubbing up against an object such as a pillow or piece of furniture. The term is derived from the French verb "frotter," which means to rub.
Frottage may be performed as foreplay or as a way to prevent pregnancy and sexually transmitted infections. Frottage when unclothed, however, can result in the exchange of fluids, which can lead to pregnancy or the transmission of sexually transmitted infections (STIs). Frottage may also be used by those who are looking to enjoy sexual contact while preserving their virginity, although exactly what "virginity" means is shaped by cultural, religious and personal beliefs. While frottage is often viewed as something people leave behind in their teenage years, it can be very pleasurable and lead to orgasm.
When clothed couples engage in frottage, it is often referred to as dry humping. Frottage is also related to the term frotting, a slang version of the term used specifically to refer to the act when practiced by two people with penises.