Here's a poem from 1829 about gay marriage:

I will tell you a Joke about Jewel and Mary
It is neither a Joke nor a Story

For Rubin and Charles has married two girls
But Billy has married a boy

The girlies he had tried on every Side
But none could he get to agree

All was in vain he went home again
And since that is married to Natty

So Billy and Natty agreed very well
And mama's well pleased at the match

The egg it is laid but Natty's afraid
The Shell is So Soft that it never will hatch

But Betsy she said you Cursed bald head
My Suitor you never Can be

Beside your low crotch proclaims you a botch
And that never Can serve for me

The poem was written by Abraham Lincoln, 180 years ago.