Former SEX + THE CITY star Kim Cattrall balked at one saucy plot line in the hit TV comedy - when her character had to explain the art of fellatio to a 13-year-old.

Cattrall, as man-eater SAMANTHA, appeared naked on the show and in a series of saucy storylines, but feared writers had gone too far when they suggested her character got intimate with a young teen.

She tells US gay magazine Out, "I had a 13-year-old niece and I thought, 'Samantha wouldn't do this.' We went back and forth with a couple of rewrites."

Eventually, the writers changed the script so that Cattrall's character chatted to the teen about the pressures of becoming an adult.