A popular trend is testing relationships on TikTok, with thousands of users participating in the "Bird Theory" challenge.
The trend involves telling a partner that a bird was seen and recording their reaction, but it has nothing to do with birds.
The "Bird Theory" videos are actually about testing a relationship using a scientific method known as the "Bid Test" to gauge a partner's engagement.
The viral TikTok trend is all about testing your relationship.
Author's summary: TikTok's "Bird Theory" trend tests relationships.