Who's lying?

It's amusing to me that this deserved an entire article. I'm pretty sure the "math" involved is within the scope of a typical elementary school student: it is logically impossible for heterosexual men, on average, to have more sexual partners than heterosexual women. The real question, then, is "who's lying more? The men who are claiming a lot of sexual partners or the women who are claiming few?"

http://www.nytimes.com/2007/08/12/weekinreview/12kolata.html