Writers, all the good ones, are Natural Born Liars.
I'm a nerd and you bet I love what I do. I am so damn good at it.
If there is a substantial difference between a gay couple and a childless heterosexual couple, I'm unable to see it.
So, we, as human beings, live in a very imprecise world. A world where our perceptions of reality are far more important than actual reality.
Never test for an error condition you don't know how to handle.
It's very strange writing science fiction in a world that moves as fast as ours does.