And marriage can be between one man and another man, it depends on the political climate of the time.
As for the bible God didn't condemn David for having multiple wives, but for taking another man's wife. Suffering for family disputes seems like a giant stretch to make a claim that God bans multiple wives when people like Abraham, Israel, the Jewish kings, and many others had many wives. Hell, Solomon had over 1000. In a day when you would be stoned to death for doing too much on the sabbath day - I'm sure if multiple wives was against any kind of law, the people would have killed them too.
If we are speaking biblically....there can be no man and man marriages.
Abraham did not have more than one wife. HE had a son with another woman...she was never his wife. It was an arrangement due to AT THE TIME Sarah not being able to bear a child.
You kill yourself by even talking about Solomon
"...of the nations concerning which the Lord said unto the children of Israel, Ye shall not go in to them...for surely they will turn away your heart after their gods: Solomon clave unto these in love...and his wives turned away his heart. For it came to pass, when Solomon was old, that his wives turned away his heart" (1 Kings 11:1-4).
In Solomon's own words on the fruit of screwing around and pleasures of the flesh:
Ecclesiastes 2:10-11
"I denied myself nothing my eyes desired;
I refused my heart no pleasure.
My heart took delight in all my work,
and this was the reward for all my labor. Yet when I surveyed all that my hands had done
and what I had toiled to achieve,
everything was meaningless, a chasing after the wind;
nothing was gained under the sun."