* Physical Action: One theory suggests that the term comes from the movement of the head during passionate kissing, resembling the movement of a neck when someone is turning or looking from side to side.
* Location: Another theory suggests that the term originated from the neck being a common area to kiss, often leading to more intimate moments.
* Sexual Innuendo: Some argue that the term gained popularity due to its suggestive nature, hinting at intimate activities beyond kissing.
Regardless of the specific origin, "necking" became a slang term in the early 20th century for intense, passionate kissing, often associated with romantic relationships.
It's important to note that the term can be considered dated and might not be used as frequently today. However, it continues to be a recognizable and often humorous reference to passionate kissing in popular culture and literature.