FK ( French Kiss )
A French kiss is an amorous kiss in which the participants’ tongues extend to touch each other’s lips or tongue. A tongue kiss stimulates the partner’s lips, tongue and mouth, which are sensitive to the touch and induce sexual arousal, as the oral zone is one of the principal erogenous zones of the body. The implication is of a slow, passionate kiss which is considered intimate, romantic, erotic or sexual. French kissing is often described as “first base”, and is used by many as an indicator of what stage a relationship has reached. Extended French kissing may be part of making out.