An Englishman, Scotsman and Welshman walk into a bar. Each orders a pint of brain's but, as they're served, a fly lands in each pint.
The Englishman immediately pushes his beer away in disgust.
The Scotsman thinks for a few seconds, shrugs, and also pushes the pint away.
The Welshman turns bright red, picks the fly out of the beer and holds it over his glass shouting: "SPIT IT OUT! SPIT IT OUT!"