It is on par. Not a choice. Neither is assexuality. Our choice, however, is to reject the faulty analysis by asexuals on this. Celibacy as a choice and asexuality as natural orientation which draws people to celibacy has no procreation either. Homosexuals marrying heterosexuals and creating children and still having gay sex seems to be the alternative and it no longer works. So does shunting gays to priesthood where asexuals can torture them or where they can have sex in secret. As for complementarity, that is between people, not sexes. Indeed, some people on occassion do switch their apparent sexuality (not their core one) because they fall in love with one person. Melissa Ethridge found out about that when a straight woman married her and then came out as hetero. These matters are better in the therapeutic comminity, since the Church has messed them and itself up too much over this issue, although Asexual clergy and hierarchs should still be OUTED.