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Published 18:56 4 Dec 2016 GMT
Updated 20:13 4 Dec 2016 GMT

In an experiment reported in The Guardian people were asked to rate strangers on how trustworthy they were and holding a cup of hot coffee made the participants rate the strangers more favourably, while holding a cold drink had the opposite effect.
The same principle applies with sweetness. People who have eaten something sugary are more likely to describe a stranger positively.
So perhaps festive mulled wine and squishy cookies are the perfect combination for a festive date?