French kiss

The term originated at the beginning of the 20th century in America and Great Britain, as the French had acquired a reputation for more adventurous and passionate sex practices.

The implication is of a slow, passionate kiss which is considered intimate, romantic, erotic or sexual.

"[7] The possibility of contracting HIV from French kissing is extremely low, as transmission would require open wounds.

[8][9] The Centers for Disease Control and Prevention considers transmission of Hepatitis B via French kissing to be an unlikely mode of infection.

[11] Occasionally, syphilis can be passed through prolonged French kissing,[12] but this usually requires contact with an active lesion.