Why shouldn’t I have more than 1 wife? (& 9 other arguments against same-sex marriage)

Updated: the post on which my blog-post depends appears to no-longer be available

How should Christians respond to arguments in favour of same-sex marriage? There are many advocates for a change in the law to permit gay couples to marry.  After all the argument goes ‘equality should mean equality’.

Peter Saunders chair of the Christian Medical Fellowship has written a blog post outlining Ten reasons not to legalise same sex marriage check it out and think it through for yourself.

Most persuasive for me is argument 9 - Redefining marriage will not stop with same sex marriage

After all  ’Equality is equality is equality’ is surely the foundation for the argument in favour of a change in the law to recognise same-sex marriage. IF equality is equality and IF we are to be free from ‘intolerant, bigoted, discriminatory and hateful’ positions in the debate I wonder whether advocates of a change in the law think that

1) a man should be legally able to marry his sister?
2) 3 or more parties should be free to enter into a marriage arrangement?
3) a muslim should be permitted under British law to have 3 or 4 or more wives?

Having rejected historical or biological arguments in favour of the ‘equality’ argument it seems only logical that those in favour of same-sex arguments will also be in favour of all sorts of marriage ‘arrangements’ between consenting adults.

If anyone can suggest otherwise I’d be happy to hear from them.