the only thing I can say is "MAGIC did that" 
Its not magic..... Its God..... Duh!!! He has gotten bored and thought "I know what will be fun... Lets fuck with people for no reason!!"
http://www.foxnews.com/health/2013/12/18/claims-virgin-births-in-us-near-1-percent-study-finds/
It appears his does it often.... 1% of the population is Jesus?
And I'm Santa Claus, ho ho ho!