If i understand your definition correctly immoral or counter-natural should be replaced with unproductive.
AUSTAN GOOLSBEE: I think the world vests too much power, certainly in the president, probably in Washington in general for its influence on the economy, because most all of the economy has nothing to do with the government.
Is there some current danger of our species not being able to propagate that I am not aware of.
Seems to me our species is propagating quite nicely.
Marriage,on the other hand,happens to be a matter of Choice.
Maybe for you,but apparently it isn't issue an issue for everybody.
Marriage is more then "tab A fitting into slot B".
Isn't there a saying,"Love conquers all"?
Whether certain parts are missing,or certain parts don't fit,is not good enough reason to deny two consenting willing adults the right to marry.