I admit I've not read the whole thread.
I totally agree with all the people saying civil parnerships were just brought in because the government did not want to legalise gay marriage.
In that sense they were a cop out.
However, they were brought in and some people have them.
So in the interests of fairness straight couples should be eligible to get them too.
Just like the arguments around gay marriage, having straight people able to get civil partnerships does not devalue them for gay people. If anything it strengthens and normalizes them.
Is it just semantics? I am not sure. I don't know how the rights or responsibilities differ. Or the expectations.
In one sense I also feel marriage and civil partnerships are really very similar, but then so is living together in terms of the day to day, it's the rights and responsibilities that change.
Lastly, TreeTop7 mentioned "The legal definition of adultery should be different as well, in the interests of fairness. Currently, adultery only applies to heterosexual sex." I really feel all people in a sexual partnership that is enshrined in law, which is really what both marriage and civil partnerships are about, should have protection about adultery. If your partner has sex with anyone, male or female, and if they are female or male, you should have the right to dissolve the marriage or partnership on that basis, or on any other basis.