To be fair, polygamy IS traditional, whereas same-sex marriage is actually an innovation. Many cultures practiced homosexuality in some form or other, but none of them thought it was appropriate to pair off exclusive homosexual couples and call them married. See: Foucault “History of Sexuality.”
The reasoning that seems to motivate the acceptance of same-sex marriage appears to me to be:
- Love and consent are the primary grounds for marriage
- Sex/gender is arbitrary
- Therefore, any two people who love each other and consent should be allowed to marry
To me, if gender and sex are arbitrary, number of partners seems equally arbitrary, so I can understand how some people would see polygamous marriage as the “next” step in the ongoing “development” in our laws.
Honestly, one wife is MORE than enough for me!!
Interestingly enough, I’ve read some Rabbinic opinions suggesting that polygamy is perfectly acceptable for Gentiles.