1.   But Nan Goldin and Robert Mapplethorpe, among others, shattered these taboos.

2.   One week ago, the San Francisco Chronicle shattered a taboo by running an ad for the Franklin Mint on the page that carries its opinion columns.

3.   The terrorist attacks, for all their horror, shattered the taboo on government spending.

4.   An Italian Cabinet member has shattered a taboo by publicly declaring himself bisexual amid the growing furor over World Gay Pride week.