In the 1980s and 1990s vibrators became increasingly visible in mainstream public culture, especially after a landmark August 1998 episode of the HBO show "Sex and the City", in which the character Charlotte becomes addicted to a rabbit vibrator. Appearing in a regular segment on the popular US television series "The Oprah Winfrey Show" in March 2009, Dr. Laura Berman recommended that mothers teach their 15- or 16-year-old daughters the concept of pleasure by getting them a clitoral vibrator. Today, CVS, Walgreens, Kroger, Safeway, Target and Walmart are among major national US chain retailers that include vibrators on store shelves.