St Patrick's Day is upon us, and every March 17 as many as 13 million pints of Guinness are sold worldwide.
For many people, no Paddy's celebration is complete without a pint or two of the black stuff. But many of us have been drinking it incorrectly all this time.
Guinness is usually poured at a 45 degree angle, before being left to settle and then topped up. It takes longer than pouring a pint of, say, lager but for many drinkers it is worth the wait.
