It's a way for folks to live within their own mean while (I guess) paying off student debt.
and counting...
How much stuff do we really need/use?
Do we need 1 gay man per townhouse/house in the suburbs?
Isn't that (among other reasons) driving/keeping prices up?
http://assets.nydailynews.com/polopoly_fs/1.2551079.1456965134!/img/httpImage/image.jpg_gen/derivatives/article_750/dv-04harkov-1-web.jpg