Sigh...
Slughorn said that you have to kill someone before you can rip your soul apart, but it is your choice as to when you take a bit of your soul out, as Voldemort sure as hell hasnt killed only 6 people. (the 7th part is still in him).
Once you have chosen to take a part of your soul out, you can implement it into anything to keep it safe. It doesn't automatically go into the person you have killed. You choose to put it into an object.
And to quote myself on Harry being the final Horcrux:
quote:
Originally posted by Tasha
I do not believe Harry is a Horcrux. I mean, Voldemort would have to be reliant on something that isn't in his control. And what if harry got killed? And why would Voldemort always be trying to kill Harry, if he was a Horcrux? It would be killing yourself.
Oh, and also, there are only 7 Horcrux's, and both Dumbledore and Voldemort and Harry know all about them. I'm sure if Harry was a Horcrux, or it was suspected that he could be, Dumbledore would have told him.