"Man Dates"

Hugo Schwyzer and Matthew Yglesias are both blogging about the social awkwardness of something known as the "man date," apparently defined as two males hanging out together. I have no idea what they're talking about. I hang out with guys all the time, and frequently there are just two of us. I see other guys doing this. If I want to go do something, I e-mail someone and see if they want to go to it, too, irrespective of gender. (I guess Matt and Hugo are implicitly claiming that any social get-together involving a male and female alone together is a date, in which case many girls' boyfriends I know should be seriously jealous.)

Seriously, where do people get this stuff?