I don’t have any problem with what Cardinal Ratzinger said, including the whole paragraph, but my thinking is not what you suggest. 

My reading of Genesis is rooted in St Paul’s observation “just as woman came from man, so man is born of woman.” 1 Cor 11:12 Adam’s life is not sterile not because of reproduction, but because God brings a separate life out of Adam. Adam (unsexed) gives birth to eve and adam, female and male. But Adam (unsexed) “gives birth” so is rightly called Eve, the Mother of all the living, as the mother of both adam and eve, the male and the female.

That is probably getting too much out of the story, but given how much has already been derived from this one story, my little touches can’t matter that much. At least it retains the repudiation of bestiality, without comparing man or woman to animals.