Does this mean that over-stimulation of the reward circuitry, via sexual or drug stimulation, can impair our moral compass? If so, perhaps sexual jollies may not be as harmless / beneficial as we believe.
Excerpt:
Complex life-and-death moral decisions that affect others depend on neural circuitry adapted for more basic, self-interested decision making involving material rewards.
(Lay article about this paper) General brain circuits process moral decisions as readily as they do everyday choices
Neuron.
Abstract
Many important moral decisions, particularly at the policy level, require the evaluation of choices involving outcomes of variable magnitude and probability. Many economic decisions involve the same problem. It is not known whether and to what extent these structurally isomorphic decisions rely on common neural mechanisms. Subjects undergoing fMRI evaluated the moral acceptability of sacrificing a single life to save a larger group of variable size and probability of dying without action. Paralleling research on economic decision making, the ventromedial prefrontal cortex and ventral striatum were specifically sensitive to the “expected moral value” of actions, i.e., the expected number of lives lost/saved. Likewise, the right anterior insula was specifically sensitive to outcome probability. Other regions tracked outcome certainty and individual differences in utilitarian tendency. The present results suggest that complex life-and-death moral decisions that affect others depend on neural circuitry adapted for more basic, self-interested decision making involving material rewards.