In the recent romantic comedy, “What’s Your Number?” Anna Faris plays a young single woman who is worried that her high number of past sexual partners, 19, will prevent her from meeting Mr. Right, and determines to find lasting love before bedding No. 20.
Men tend to overestimate, while women generally underestimate. -- In general, though, there seems to be a double standard. What’s in a number, and why should a woman’s be lower than a man’s?