Absolutely. Everybody knows that the Pilgrims fled to America so that men could have the freedom to marry each other.
However marriage is and should be an institution between one man and one woman only. Polygamy, polyandry, and other arrangements are not a part of Western Civilization, and Western Civilization is by far the greatest accumulation of wisdom and civilization ever devised.
If people want other arrangements, they can make them through contracts.
Homosexuality is not normal, and it is not a variation of normality. It is a disorder of the reproductive system.