Metrosexuals?

Well I have heard of heterosexual (which I understand), and homosexual (I know what it is but don't understand it) but metrosexuals? The article explains it but it brings to my mind something not very pretty. I guess Howard Dean feels that he needs to out himself on this issue. If the Democratic candidates make this a campaign issue it must be pretty important to them.

What do I know about sex? I'm a married man.
Tom Clancy