"Male Fruit Flies Show Increased Aggression and Stress After Sexual Rejection"

A study on male fruit flies reveals that repeated sexual rejection leads to increased activity, aggression, and anti-social behavior, indicating a frustration-like stress state mediated by the neuropeptide F signaling system in the brain. This social stress affects the flies' resilience to other stressors like starvation and toxic exposure, providing valuable insights into the neurobiological basis of social stress in a model organism.