I'm going with the bacon one. Not because bacon is great, but because polygamy isn't a good idea. I mean, first, it's incompatible with the conception of women as being equal to men. We see marriage as being a joining of co-equal entities. Having multiple wives is not really compatible with that.

Secondly, polygamy (even with the necessary submission of women to men) kinda fucks over everyone but a few rich bastards. The harm to women is obvious, but the harm to men exists as well. There is not an unlimited supply of women in the world. Every man with a second wife is dooming some other man to solitude. If one rich bastard has 100 wives, that is 99 other men who must therefore be forever alones. Unless you're going to start aborting male babies to supply society with a surplus of wives, far more men are going to end up solitary than will end up with nightly threesomes.