Sells,

What have you to say to those who, for whatever reason, remain unmarried or childless? or even to those who marry and find it is not as 'fulfilling' as promised?
Here we have Scripture extolling the virtue of a particular life circumstance and seemingly deprecating by neglect all other possibilities.
At this point we must point out that Scripture is limited by the predilections of its writers and biases of its readers, not to mention the interests of those who determined its inclusion within the canon.
Having committed yourself to the view that marriage and parenthood are uniquely fulfilling of humanity you cannot have much encouragement to offer singles and gays. No fulfillment for them?
At a wedding, by all means, use the creation story as you have but that cannot be the last word and you are duty bound ultimately to balance the books at some time and acknowledge that salvation in Christ is for all and fulfillment is not limited to those whose life circumstances lead to marriage and parenthood.
Surely a part of the exegetical enterprise is to expose the bias of scripture or what Spong call the 'Sins of Scripture'. Even after we dispose of the literal readings that so impoverish the lives of many readers it remains that the Bible has flaws, omissions and inaccuracies and it is the exegetes duty to proclaim these, expose them and deal with them