It seems like you might be referring to the concept of "narcissistic supply" rather than sociopaths specifically. Narcissistic supply is a term used in psychology to describe the emotional sustenance that individuals with narcissistic personality disorder (NPD) seek from others to validate their self-worth and maintain their self-esteem. This supply can come in various forms, such as admiration, attention, praise, and even fear or attention from others.
It's important to note that not all individuals with narcissistic personality disorder are sociopaths, as these are two distinct psychological conditions. Sociopathy is now more commonly referred to as Antisocial Personality Disorder (ASPD), and while there may be some overlap in traits, they are not the same.
The reason narcissists (including those with NPD and some sociopaths with NPD) never seem to run out of supply is that their behavior and manipulative tactics tend to draw in new sources of supply as they may cycle through people in their lives. They often use charm, manipulation, and charisma to attract new people who might fulfill their need for validation and admiration.
Additionally, narcissists are skilled at identifying individuals who are vulnerable, empathetic, and prone to caregiving, making them more likely to provide the emotional supply the narcissist craves. These individuals may become enmeshed in a toxic relationship with the narcissist, continually providing the desired emotional sustenance, even at their own expense.
It's essential to remember that not all individuals with NPD or sociopathy are the same, and not everyone with these conditions seeks or relies on a constant supply. Treatment and personal growth can lead to changes in behavior for those with these disorders, but it's often challenging for them to recognize their issues and seek help due to the nature of their conditions.