Final answer:
EP has no stress due to his anterograde amnesia which prevents him from forming new memories and retaining experiences that could potentially cause stress.
Step-by-step explanation:
The reason there is no stress in EP's life in 'The Most Forgetful Man in the World' is that EP suffers from anterograde amnesia, which is characterized by an inability to remember ongoing events in his life. This means that EP's episodic memory is compromised, so he doesn't retain any new experiences, only those in the very immediate past. Without the ability to form new memories, EP does not experience the psychological impacts of stressors that would typically affect well-being because he can't remember any of the events that might cause someone stress.