Psychopaths are known for their predatory ways. Well, the neurotypical would call it predatory; I’d call it taking advantage of openings. The truth is, we detect when others are weak and vulnerable and, if the price is right, we strike. Conning, manipulation, parasitism, and theft are not uncommon for psychopaths. Like the mosquito that identifies the best host to feed upon, the psychopath can do the same. Without a sense of conscience and without the capacity for remorse, it just makes sense.
Many, incorrectly, assume that since the psychopath lacks affective empathy, that they must not have any understanding of how another functions. This could not be further from the truth. We may lack the capacity to automatically feel what others are feeling (affective empathy), but we do understand why they are feeling what they are feeling. I know, at times, I have to step back and accept that the ‘why’ of what they are feeling seems juvenile to me, but I still grasp the mechanisms that are in play. Having this understanding allows me to find targets easily for parasitism and other useful behavior. Like a heatseeking missile, I am able to detect their vulnerabilities, knowing why they are vulnerable. It all comes down to understanding their emotions as well as their wants and needs.