Paddster,
Mary conceived via the Holy Spirit. She was not touched by a human. The baby she carried was Holy, that's why he had to be born that way. Man's seed was corrupt originating from when Adam sinned in the Garden of Eden. Jesus had to come without corruption. That's why he knew no sin. Jesus was both human and devine. If you read your bible, you would know that mary and Joseph were not married when she conceived Jesus. When they married she was already pregnant.
The sole purpose for God manifesting himself in the flesh and coming to earth in the form of his son Jesus, was to redeem man from his sins. He came so that you and I could have another chance at life and not be condemn to and eternal damnation (hell).
The Bible tells us that we will be forgiven of every sin except for blasphemy against the holy spirit. We will not be forgiven in this world or the world to come. If I were you I would be careful. You are treading on shaky ground.
As for me, I am glad that Jesus came, because I was a sinner. I am saved only by his grace. To put it bluntly, I am glad he did it with another man's wife.
You can either accept him or reject him, but I garantee you one thing, in hell will you lift up your eyes. If I were you, I would be careful, very careful, You are sailing in unchartered waters.
Be Blessed.