I have observed over time that the cuteness of comments generally increases as the inability to refute them nears absolute.
You mention the far left and far right ends of the spectrum. Where do you think the support for homosexuality comes falls on that spectrum? And where do you think approval of adoping young children into such homes rests on that spectrum?
Do you really think that falls into the middle ground? Frankly it's about as leftist an idea as there could be. And so it's rather interesting that you would make the comment you did.
And the fact is that Mary Cheney and other homosexuals have kids...and as most of the posters on this thread have stated - it is really no one else's business.