A soft launch, in celebrity dating slang, is the gradual, deniable unveiling of a relationship — a hand in a photograph, a shared location, a walk in public — instead of an official announcement. Commentators applied the term to Emma Chamberlain’s hand-holding stroll with Eden Joel, arguing the pair allowed themselves to be discovered rather than declaring anything. The technique keeps control with the famous person while feeding the audience’s curiosity.
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Mentioned in: Why a Single Hand-Hold Can Shake the Internet: Emma Chamberlain, Eden Joel and the Anatomy of a Modern Dating Rumor