By Dean Egan.
How do you eat a chocolate digestive?
If you enjoy the biscuit with the chocolate-side facing up, you're eating it incorrectly according to an Oxford Professor.
According to the Daily Mail, Professor Charles Spence has said the chocolate-side must be facing down to fully enjoy the biscuit, due to the position of the taste buds on the tongue.
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"The sensation of chocolate melting on the tongue adds another dimension", according to Professor Spence.
His theory also applies to chocolate hobnobs and Jaffa Cakes, and is outlined in a study to be published soon.
