". . . Only her hairdresser knows for sure." When there's only one female employee in the copywriting department, you give her a shot at the product geared toward women. Shirley Polykoff, who coined the phrase that jump-started the home hair-coloring industry, felt that a woman had the right to change her hair color without everybody knowing about it. The campaign lasted for 15 years, and Clairol's sales increased by 413 percent in the first six years!