While learning about this under-researched and difficult-to-place sensation, a guy contacted me on Twitter to explain that he gets a similar feeling when his belly button is touched. This knocked me ...

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Editor’s Note: The views expressed in this commentary are solely those of the writer. CNN is showcasing the work of The Conversation, a collaboration between journalists and academics to provide news ...

From slugging to mouth-taping, there’s no shortage of social media trends claiming to fix, well, just about anything. The latest one involves putting castor oil in your belly button, also known as ...