The discussion revolves around the origins and cultural significance of kissing, with participants exploring various theories. One prominent theory suggests that kissing originated from the practice of mothers pre-digesting food for their babies, a behavior still observed in some primitive cultures and animal species. This notion challenges the idea that kissing is purely a cultural construct, indicating that it may have evolutionary roots linked to feeding and nurturing. Participants also discuss the potential for kissing to serve as a means of assessing compatibility through chemical exchanges, such as pheromones. The conversation highlights the complex interplay between biological, evolutionary, and cultural factors in the development of kissing, while also acknowledging its enjoyment as a social behavior.