Who permanently defined marriage as one man one woman?
Nature.
Did you not take Science in grade school? Or '
skewl' as you likely recognize it.
Ya see scamp, human physiology provides for two 'genders'... there the male, which for you edification we'll call the
'Outee' and the female, which you may better understand as the
'inee'.
The Inee she allows the outee 'in'... and that's how babies are made.
Because of babies, the inee gets all bloated and bitchy and because of that she's shut out of most of society... plus she is weakened by her
condition and without the help of the outees, she'd likely die along with her baby. And that would be BAD.
So... the natural consequence of that, for people NOT afflicted with perverse reasoning, is that the inee joins with the outee in a union which is sorta like when the inee joins physically with the outee, becoming one body where prior to the union, there were two... and we call thus union: Marriage.
It's a very serious thing, despite the habit of very foolish sub-humans called Leftists, or 'humanists' who like to make light of that very simple principle, much as they made light of the sound actuarial lending principles which they recently disregarded, managing to crash the international financial markets.
So... because we, The 'Americans' are interested in maintaining a viable culture and NOT crashing it on the rocks of Leftist stupidity (
pardon the redundancy), we are rejecting you idiots and your demand that we should consider abnormal reasoning to be normal and lower the threshold of marriage, changing it defining standard, so that you ladies can feel legitimate, despite you illegitimacy.