So why oppose gay marriage?
Certain religious leaders would have us believe that public acceptance of gay marriage will have a harmful effect upon heterosexual marriage, yet they offer no evidence in support of this claim.
So let's imagine asking every married (or engaged) heterosexual couple this question: if gay marriage is legalised, will this cause the two of you to love each other - and your children - any less?
I'm sure that even clerics have the common sense to realise that the vast majority of couples would say no.
So on what grounds, if any, do they base their concerns?