What's wrong with all this is that men and women who were essentially homosexual or lesbian, have been made to marry by the forces of society down the centuries, whether in the West, the Middle East, or Far East, as their religious diktats demanded. They were expected to have children, and so children have historically always been begotten by and brought up by parents where one, and perhaps even both, have had a preference for a same sex orientation, but were precluded from expressing such desires.
Equally, children have been born into bisexual partnerships, with apparently none worse the wear for it. So this tosh about not giving a religious blessing to OVERT, rather than covert, gay/lesbian relationships re children (either via IVF, AI, adoption or good old plain intercourse) is hypocritical and absurd.
It's not a question, Miz Kelly, as to whether gay or lesbian couples 'could' make good parents. The answer is that they've been doing so, but under the duress of a 'straight' marriage, for eons. What was worse, was that in many cases, the non-straight partner would often find the love of their life outside of these marriages, and be unable to live openly - as many still can't, particularly in strict Christian and Muslim communities - and pursue a sometimes lifetime affair, to the detriment of home life.
One would hope that in the 21C, gone are the days when a wife was shocked to find out that her husband and father of their children was, in fact, also a homosexual with a partner of years 'on the side'. But it isn't true, this is still happening, and why on earth should it stupidly persist when non-straights are still hounded and vilified by religious bodies, let alone with the bias of government ministers applying their will?