We are all a little crazy.

I saw a werewolf drinking a pina colada at Trader Vic's. His hair was perfect.

The sociopath wants the person to be easily enough fooled to stick with him. This can be accomplished by looking for someone who is very, very loyal. Most of us consider loyalty to be a very positive trait - and it is a positive trait. But it also blinds people to some of the traits of the person they're loyal to.

Sociopaths are not afraid of very much, except for physical harm and dying - really primitive, basic kinds of fears. The problem with being alone for a sociopath is boredom.

The most reliable sign, the most universal behavior of unscrupulous people is not directed, as one might imagine, at our fearfulness. It is, perversely, an appeal to our sympathy.

If you see somebody really pulling for your sympathy while at the same time hurting you intermittently, you should start to wonder. If somebody plays to your pity and really tries to draw that out of you, that's not normal.

The physical basis for sociopathy is approximately 50 percent inheritable, which sounds more dramatic than it probably is, because most personality characteristics that psychologists test for and study the genetics of are about 50 percent inheritable. Introversion, extroversion, it turns out that they're about 50 percent inheritable, which means that somehow sociopathy is physical, it's organic.