"FlirtFirst" refers to the initial action taken by a creator, where they record and send a Flirt to random users on the platform. This Flirt serves as the first interaction with the users.
"FlirtBack," on the other hand, refers to the response from the users to the Flirt sent by the creator. Users can choose to respond to the Flirt they receive from the creator by sending their own Flirt. This response is known as a FlirtBack.