[[!meta title="They Eat Happiness"]]

In canon, Dementors don't eat happiness; they clearly feed on *un*happiness,
and are driven away by happiness. But everybody says they feed on happiness.

So, okay, let's make Dementors who feed on happiness. They make you feel happy,
as they drain your life away. Azkaban is escape-proof because no-one wants to
leave (except Sirius, who knew that Pettigrew was still out there, and that
Harry wasn't safe).

The Patronus is a dark, dangerous spell. You have to focus on true misery in
order to cast it. Children are incapable; they simply have never known genuine
pain.

Except for Harry, who only has to think about returning to the Dursleys.

Third year, probably wants to lead to a dark!Harry as he learns the power that
can be fueled by embracing his strife.