Summary:
- The article explores the evolutionary and cultural origins of the human practice of kissing, which is a near-universal behavior across cultures.
- It highlights the lack of a definitive scientific explanation for why humans kiss, noting that while there are various theories, none have been conclusively proven.
- The article discusses the potential biological and psychological factors that may contribute to the development and persistence of kissing, such as pair-bonding, sexual arousal, and the exchange of chemical signals.