X-celling Over Men:
"'Alas,' said one of the authors of the study, the Duke University genome expert Huntington Willard, 'genetically speaking, if you've met one man, you've met them all. We are, I hate to say it, predictable. You can't say that about women. Men and women are farther apart than we ever knew. It's not Mars or Venus. It's Mars or Venus, Pluto, Jupiter and who knows what other planets.'
Women are not only more different from men than we knew. Women are more different from each other than we knew - creatures of 'infinite variety,' as Shakespeare wrote."