If gay marriage should be legal, should polygamy also be legal?
both are immoral so might as well do both if your doing it. Let us legalize child molestation while we're at it (sarcasm).
If there argument is everyone should be able to get married then a pedophile should b able to marry a 6 year old
Marriage between any number of consenting adults, of any sexual orientations, should be legal. There's no reason any form of marriage between consenting adults should be illegal.