"Objection to gay marriage isn’t about religion at all and the letter that the bishops are sending to Catholic churches does, to do them credit, make that clear."
London journalist Melanie McDonagh confirms the meaning of marriage in regards to natural law, or as she calls it “human nature.” She says marriage should be "child-centred" and even though same-gender couples can use modern technology and surrogate mothers to generate a child, this family is "always going to have something absent at its heart, the complementarity of the sexes."
From the UK Spectator:
"Plainly gay partnerships can be committed and loving, and civil partnerships recognise the commitment. And on the margins, post-IVF, gay men can now father children by surrogate mothers and raise them with their own partners, and gay women can use surrogate gametes to do the same. But that parental relationship is always going to have something absent at its heart, the complementarity of the sexes, which means that sons and daughters learn about gender from how it’s lived out in their own family. And a relationship cannot be a marriage, as traditionally and everywhere understood, where children cannot naturally be part of the equation.
What I’m saying, and what the bishops are saying, is that marriage is child-centred, even though children may be involuntarily absent from good marriages. We cut that anchor at our peril. For the optimal environment for raising children you need a stable environment with parents of either gender. And even in a reluctantly childless marriage, the complementarily of the sexes, the very fact of sexual difference, gives the institution its nature, its charge. To say as much isn’t to advance a religious argument. It’s to work from nature, from history, from human experience. The very definition of a marriage is a union between a man and a woman. Let’s leave it like that."