When did it become necessary to bear children in our to be married? So you are saying those unable to bear children are not allowed to be married? A women that has had a hysterectomy cannot be married? A man that is sterile cannot be married? A woman post-menopausal cannot be married? Keep reaching.
At it's most basic essence, marriage is a cross cultural constraint on evolutionary mating behavior.
Gay couples are the picture of defective failure. Mating behavior gone abusive with NOTHING to show for it.
STILL no logical counter to this fact;
A fruit tree bearing fruit.
A fruit tree not bearing fruit for some reason.
A nut tree who never bears fruit wanting to be a fruit tree.
A nut tree hanging fruit on it's branches pretending to be a fruit tree.
The claim that if the government doesn't 'require' fruit trees to bear fruit, then it is discrimination not to call nut trees fruit trees too!