HUANG PU. From a fertility jar that is five centuries old to a 1960s marriage certificate with a political slogan, the items on display at this risqué museum chronicle the ever-changing morals of China. The Museum of Sex Culture, founded by Professor Li Dalin, exhibits a number of ancient and modern artifacts that depict the country's attitude toward sex. Curious visitors can see everything from tea sets with intricate detailing to erotic portraits. Because of the subject matter, no one under 18 years of age is admitted. METRO: Line 2, Henan Zhong Lu