[4] The phrase is most known for its appearance in the Pilot episode of CBS sitcom How I Met Your Mother which first aired on September 19 2005.
[2] The olive theory is similar to the concept of opposites attract, an idea in which two people work well together when they have contrasting points in their personalities and lives.
The idea of people being compatible because of tastes and preferences can be a good talking point early on in a relationship.
[3][5] TikTok has been the main platform for sharing how the olive theory presents itself in actual relationships and friendships.
[5] Creators have taken the liberty of getting creative with the concept by interchanging olives with whatever food or other characteristic applies to their dynamic with another person.