The Father Theory
Some of you have touched upon the fact that Palpatine quoted the legend: "The Tragedy of Darth Plagueis the Wise." There were two very important points contained in this story. The first was that Plagueis could create life and two that he could preserve life. Now at the time within Episode 3, when Palpatine told Anakin about the legend, I was more concerned about the saving of Padme from death, that I overlooked the fact that the force could create life. This may mean that Plagueis could be the father, or it was just a metaphor. It could also mean Palpatine learned how to create life from his possible master, which hasn't been confirmed entirely, but did not learn how to preserve life before he killed Plagueis. I myself believe that Plagueis was Palpatine's master and sith lord. Palpatine seemed very enthusiastic when he chuckled about Plagueis not being able to save himself from death. I agree with the others about Palpatine's close relationship with Anakin. Looking over Anakin while he grew up from a boy to a young man. Showing concern that Anakin was still alive after the battle with Obi-won. The father like composure Palpatine had when leaning over to touch Anakin on the shoulder while he laid there burnt. To me that seems like a father. Apart from all that, the fact still remains that Palpatine said that Plagueis could create life. So the Miticlorians could not have been stimulated without an outside stimulus. Hence, the father theory.