OK, point taken re the LA's and adoption & fostering by gay couples. But that doesn't answer my question. What about couples who want their own children and not someone else's?
Do you think they shouldn't be able to have them if they can find a woman who'll act as a surrogate? I agree with DD, the BiB is totally outside the remit of this conversation and a different matter altogether.
On your first point, I hope you don't think me flippant to quote Mick Jagger - "You can't always get what you want"! Many of us want things - perfectly naturally but that doesn't necessarily justify using unconventional means to obtain them. I also think that those who feel unable to love and care for a child who needs them because he or she is not biologically theirs may not be totally cut out for real parenting (as opposed to just spreading their genes!)