My sperm beating the rest to the egg was probably the proudest and only achievement I've ever accomplished in my whole life so far.(Original post by Plantagenet Crown)
Don't you think you quite understand reproduction. Several sperm all reach the egg at roughly the same time, but they still have to burrow their way in and once one is in the egg it "closes" so to speak to prevent any more entering, there can only be one father.
But did you bother to watch?