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HAMSTERDAM WILL COCK YOUR TAIL

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Gingering was a technique employed by horse traders to fetch higher prices for their cocktails. A horse with a spring in its step, wide-open eyes and, most importantly, tail held high would sell for more. A well-placed thumb of peeled ginger produced the desired effect, at least until the horse was sold.

http://www.telegraph.co.uk/luxury/travel/1256/the-surprising-history-of-the-cocktail.html