have linked the excess dopamine in sociopaths to a hypersensitive reward system in the brain that releases as much as four times the normal amount of dopamine in response to either a perceived gain of money upon the successful completion of a task, or chemical stimulants. These researchers suggested that the overactive reward system is to blame for a sociopath’s impulsive, risk-seeking behavior because “these individuals appear to have such a strong draw to reward—to the carrot—that it overwhelms the sense of risk or concern about the stick.”
I have my own doubts about this hypothesis, though. A hypersensitive reward system could explain why sociopaths are allegedly sex fiends, at least compared to the rest of the population. It could also explain why you’ll see them at the top of their field, professionally speaking. Sociopaths are probably contributing to society in all sorts of random ways in order to trigger an enormous amount of dopamine flooding through their brains. Risk takers, though? Maybe we are, but I don’t think it’s because of excess dopamine, particularly because an earlier study at Vanderbilt showed that
low
amounts of dopamine were highly correlated with risk taking and drug abuse. From personal experience, I feel like my risk-seeking behavior stems from a low fear response or a lack of natural anxiety in potentially dangerous, traumatic, or stressful situations.
I do all sorts of risky and often stupid activities, particularly when you consider that I am a financially secure white-collar professional with a brilliant IQ who was raised devoutly religious in a stable middle-class home. When I was young, I did the usual reckless teenage stuff: mosh pits, hitchhiking in developing countries, being towed in a shopping cart from the back of a truck, fistfights, etc. I might have grown out of someof the more childish thrill-seeking activities, but I never quite grew out of the inability to learn from experiences.
One summer I lost all of my savings trading high-risk options. Not only were the options risky, I took an incredibly risky approach to them—holding when I should have sold and putting all of my eggs in one basket. Even after many failed trades, I still took unnecessary gambles. I knew objectively that I was losing a lot of money, but I couldn’t make myself feel the pain of it in a way that seemed to matter. Though it doesn’t seem related, I don’t use knives. The risk of injury never sinks in, even with such a mundane tool. I’ve cut myself many times, lopping off chunks of skin or cutting down to the bone and requiring stitches, but I can never force myself to be more careful, so now I just don’t use them.
I’ve always loved to bike in cities, partly because it’s so dangerous. If a car starts creeping into my lane, I will punch at it or use my portable tire pump to swing at it. If a car cuts me off, I will follow it until I catch up, then dart in front and come to a skidding halt, forcing them to slam on their brakes. I’m sure it’s incredibly dangerous for me to do this, and really only for me, but it also freaks the hell out of them. And I don’t really care for my safety enough to change my behavior. It’s not that I’m being irrational. It’s that suffering the consequences of something rarely involves actual “suffering.” Maybe there is a small thrill in taunting drivers or risking my life savings, but mainly it’s that I just don’t feel sufficient anxiety in these situations warning me to be more careful.
I can’t tell you how many times I have gotten food poisoning from eating rotten and questionable food, but I never seem to learn my lesson. A few years ago I woke up naked on the floor of a YMCA shower. I couldn’t remember how I had gotten there, but I am sure it was something stupid. People who knowtheir limits don’t end up passed out naked in a YMCA. I don’t have the off switch in my brain telling me when to stop—no natural sense of