A French kiss, also known as cataglottism or a tongue kiss, is an amorous kiss in which the participants tongues extend to touch each others lips or tongue. It is a type of kissing that stimulates the partners lips, tongue, and mouth, which are sensitive to the touch and induce sexual arousal. The sensation when two tongues touch has been proven to stimulate endorphin release and reduce acute stress levels. French kissing is often described as "first base" and is used by many as an indicator of what stage a relationship has reached. Here are some tips on how to French kiss:

• Move in closer to your partner.
• Start with a regular kiss and then slowly open your mouth.
• Use your tongue to touch your partners tongue or lips.
• Alternate taking the lead on the movements of your tongues and lips.
• Stay playful and tag the other persons tongue lightly and retreat back, inviting them to make the next move.
• Be an active partner and reciprocate your partners actions.
• Swallow periodically without breaking the kiss to avoid excessive saliva buildup.
• If you are uncomfortable with any part of the kiss, do not be afraid to pull away or gently close your lips.

French kissing is a relatively new phrase to the English language and culture, arriving in the States (and Britain) in the early 1900s.