First, the ability to have such a legal relationship is denied to a great number of people who love each other just as much as any heterosexual couple.
Second, such an arrangement gives them financial benefits they haven't earned. It's unacceptable to me that having a piece of paper gives you tax benefits.
I'm with you here. I do believe it's something the government should stay out of. Civil unions for everyone, if they must, and religious ceremonies and "marriage" as something with no legal recognition.
Third, and this is where a lot of people get offended, I believe that it is extremely disadvantageous for a man to get married in the legal sense. Like it or not, a great many marriages end in divorce. Such divorces are typically initiated unilaterally by the woman, taking advantage of the so-called 'no fault' system of divorce which allows the splitting of assets with no need to prove any wrongdoing.
The divorce system in no way favours men, so custody of the children and ownership of the family home is typically retained by the woman.
I believe that men would be better off cohabitating in an 'unofficial' marriage but even then, as others have said, a man can't even do that because eventually the law will say he's married anyway.
I just can't accept a system that allows a man to lose his home and his children without anyone having to demonstrate that he actually did anything wrong.
It was my understanding that at least in the US, common-law doesn't apply in the vast majority of states. I could be wrong about that. The divorce system does favor women, particularly in custody matters. Then again you have people like my sister who got screwed over financially by her marriage and subsequent divorce, or couples like my husband and I where he was actually the one that wanted to get married.