Below are a few red flags that many with psychopathy have in their past or demonstrate when they interact with others.
It is important to note that this is not a list of diagnostic criteria of psychopathy. No—I hate you." After the honeymoon stage, they are often disinterested, disrespectful and abusive.
You might want to go to the movies–your partner will make sure you go out to dinner instead.
You might think that's something you'd know right away by the red tint of evil in the person's eyes, the swastika tat on the forehead, or the insistence on discussing serial killers over dinner. Psychopaths can be extremely charming and come across like Prince Charming at first. On the first date, he'll probably tell you that you are stunningly beautiful, unbelievably intelligent, and uproariously witty.
So unless you know the signs, you'd probably get sucked into the life of a psychopath and not know who he or she really was until you are completely sucker punched. He will play into every fantasy and insecurity you have.
Brain anatomy, genetics, and a person’s environment may all contribute to the development of psychopathic traits.
The terms “psychopath” and “sociopath” are often used interchangeably, but in correct parlance a “sociopath” refers to a person with antisocial tendencies that are ascribed to social or environmental factors, whereas psychopathic traits are more innate, though a chaotic or violent upbringing may tip the scales for those already predisposed to behave psychopathically.