A reader writes:
I think the higher acceptance of polygamy makes sense if you take into account, for lack of a better term, the Dan Savage demographic where there is stark moral difference between people who are in open relationships and people who would be considered a CPOS (Cheating Piece of Shit). In other words, at least polygamists are honest. Cheating on your spouse involves an inherent act of deception.
Another writes:
I think these kind of surveys would be a lot more interesting if people were asked to rate each issue on a scale of 1 to 5. The average of these ratings would be much more indicative of how people feel (and the intensity of their feelings) than the percentage of people who find each issue morally wrong. I would wager that polygamy and adultery would switch positions in my schema. Nearly everyone may think adultery is morally wrong but they probably don't feel so intensely about it as they do about polygamy.
Another:
More shocking is that 66% of Americans think pornography is morally wrong. This requires an astonishing amount of denial and hypocrisy. The majority of women have watched or watch porn, and the overwhelming majority of men watch porn. This means that most of the people who answered "morally wrong" do it. The same sort of hypocrisy is on display with the 36% who deem sex between unmarried adults as "morally wrong" despite the fact that statistics show that most of those people weren't virgins at the altar.
And I don't know what I think of a country that deems the death penalty more moral than an unmarried couple making love. Whatever it is, it's not good.