How about... this ending? Dementor question...

[Krissy]

No: HPFGUIDX 95374

<snipped from post>
Laura Huntley wrote:
> I liked the idea another listie mentioned a few days(weeks??) ago -
- simply put, people who are given the Dementor's Kiss eventually 
degenerate into Dementors themselves.
> 
> I like this theory a lot, as it explains *why* Dementors want to 
go about sucking up souls -- they were deprived of their own, thus 
they are "soul-hungry".
> 
> So, where did the first Dementor come from? I
thought maybe it was a spell gone awry (perhaps the same immortality 
spells Tom used that so disfigured his physical form, only gone 
*more* wrong). So some 
wizard, questing for immortality, accidentally ousts his own soul, 
thereby turning himself into a monster. This monster naturally feels 
the want of a soul and the emotions that go along with having a 
soul. Therefore, it "eats" souls when it can and survives by feeding 
on emotions in the meantime.
> 

Krissy here--

I wonder if the Dementors aren't more along the lines of the Nazgul 
from Lord of the Rings, where they were offered power and took it 
without questioning it, and the payment they received was to be 
forever bound to one lord.

I don't have any of my books handy, but is it mentioned anywhere 
when the first Dementor was sighted? Perhaps they were creations of 
Salazar Slytherin, and since Voldemort (Tom Riddle) is the heir of 
Slytherin that is why they respond to his call. 

Once again, just a theory. :)

~Krissy
Desperate for caffeine