"When Genesis comes to man's creation, it states that God deliberately created mankind in two sexes in order that he should 'be fruitful and multiply'. This is the first command given to man and is repeated after the flood; contrast the gods of Babylon who introduced various devices to curtail man's reproduction. In that homosexual acts are not even potentially procreative, they have no place in the thinking of Gen 1. Nor do they fit in with Gen 2. There the lonely Adam is provided not with a second Adam, but with Eve. She is the helper who corresponds to him. She is the one with whom he can relate in total intimacy and become one flesh.
It therefore seems most likely that Israel's repudiation of homosexual intercourse arises out of its doctrine of creation. God created humanity in two sexes, so that they could be fruitful and multiply and fill the earth. Woman was man's perfect companion, like man created in the divine image. To allow the legitimacy of homosexual acts would frustrate the divine purpose and deny the perfection of God's provision of two sexes to support and complement one another. St Paul's comment that homosexual acts are 'contrary to nature' (Rom 1:26) is thus probably very close to the thinking of the Old Testament writers." (G.J.Wenham)