The dentist advised regular flossings.

Around the world these days there are thousands of Joycean scholars who make their living parsing and reparsing the great man who, perhaps much to his chagrin if he were alive, has become a symbol of all things Irish to millions.

Some programming languages even permit a subroutine to contain itself as a subsubroutine; a brain-twisting arrangement.

There were several Italic alphabets, one being the Etruscan alphabet.