Why is it so important for Christians to maintain that their Jesus Christ was born of a virgin birth? I'm beginning to think that the idea that his mother Mary was a virgin was borrowed from the pagan traditions of the Romans and Greeks, especially since it raises so many problems and questions if taken at face value.
For one, Christians believe God created humans, and in them, all the biological processes required both to live and to propagate. And God saw it, and called it "good". But yet, the notion of birthing a child is to God so obscene that he makes his incarnation be born in an un-natural fashion, rather than simply using the method he himself had created!
Secondly, Christians believe Jesus was fully human, and subject to the biological processes of a human. So God spared Jesus the ritual defilement of being from natural birth, but did not exempt him from equally 'disgusting' processes and bodily phenomena such as defecation, urination, sweating and body odor, vomiting, sneezing or coughing up phlegm, etc: all acts that he must have committed in his lifetime, since all humans experience these (it is even possible he masturbated, but I won't stress this). It seems incredibly arbitrary for God to have spared Jesus the "impurity" of being conceived by the union of egg and sperm, but to have not cared whether his Divine Incarnation shat from his asshole or whether he stank to heaven after days of not bathing in the Judean desert.
Additionally, a number of early Judeo-Christian sects didn't hold the idea of Jesus being born of a virgin birth, and most of these sects seemed to gravitate towards the idea that Jesus was more a great teacher or Jewish Messiah than an actual divine being. It really does seem likely the virgin status of Mary and virgin birth of Jesus was a tradition borrowed from the pagani.