It’s Good to Be Dr. RuthSex follows some women everywhere, even the New York Philharmonic. Tuesday evening, Dr. Ruth Westheimer, 79 years of age and four-foot-seven in height, stood in the aisle waiting for Yo-Yo Ma’s opening-night performance. “Mort Zuckerman just came up and kissed me and said that I’m the best woman around,” she told New York. “And he had a date! She just stood there and smiled. What could she do?” She beamed. “It’s wonderful to be Dr. Ruth!” Westheimer had had a busy day. A study had just been released, showing that 55 percent of divorced women aren’t having sex, and everyone wanted her advice. “If she’s divorced and doesn’t have a partner, it makes sense,” she said. “But I hope that she keeps her libido, her desire for sex, alive. That she goes out, that she looks around if there are any eligible people, and if not, I do say that until she finds a partner, I want her to masturbate.”