Few sex educators are as well-matched to the task of dispensing safe, honest, affirming sex advice as Ducky Doolittle, a former Times Square stripper, who emerged from behind the peepshow glass to climb to the top ranks of advisors on all matters sexual. For more than a decade, she has toured the country with her one-woman show, visiting hundreds of cities, where she has answered sex advice queries from thousands of women and men-partnered and singled,...