Dementors

[dillgravy]

No: HPFGUIDX 158945

I was hoping to start a discussion on Dementors and their possible origins. Do we know how 
they came to be? Were they ever human? They aren't "beasts" because they're not mentioned 
in the "Fantastic Beasts and Where to Find Them". 
I apologize if this has been discussed at length. I've looked on The Floo Network and only 
found extensive descriptions but nothing referring to how they came to be. Maybe someone 
has a really good speculation... it's a good topic with Halloween approaching!!!