They are diseased people, but in terms of meat perfectly healthy.

The darkness of the mind creates horrible acts, like the man in
Austria
holding a girl he kidnapped at age 11 for 7 years in a dark place
under
his house, in a place nobody heard her yelling for help. She escaped
at
age 11.

Psychopaths have a desire to possess somebody insanely, that's
why they follow people, and even become those people they follow:
they know everything about them. The chill they leave on their
victims is one from a Steven King terror film.

Usually impotent, as Hitler having all kinds of sexual problems,
psychopaths seek the coldest acts to turn themselves on.

Hitler spoke to his doctor of having orgasms during his speaches.
To him, it was sexual.