Andrew Brown thinks so, based on the relevant passage in Seewald’s book. I hesitate to comment with any conviction until I have read the full passage myself, but the published extracts are disturbing and important. Up to now, there have been some signs of a more rational approach to homosexuality under this papacy, but some of these views strike me as just wackadoodle. Benedict is widely acclaimed as a great and subtle theologian, but he could do with some lessons in basic facts of gender and sexuality.
We could say, if we wanted to put it like this, that evolution has brought forth sexuality for the purpose of reproducing the species.