An Irishman went for a job and was told he would have to pass an I.Q. Test. When asked what an IQ. Test was the employer explained that anyone with an IQ. Of 150 would be admitted to university, but a bloke with an IQ. Of 50 would have trouble tying his shoelaces.
"Oh," said the Irishman, "so that is why so many Australians wear thongs."