Stress is the consequence of the failure to adapt to change. It's the condition that results when person-environment transactions lead someone to perceive a discrepancy, whether real or not, between the demands of a situation, on the one hand and, on the other, the resources of their biological, psychological or social systems. Stressful stimuli can be mental, physiological, anatomical or physical.

 

The term 'stress' in this sense was coined by the Hungarian-Canadian endocrinologist Hans Selye in 1936. Source: Wikipedia

 

So do you think he is stressed? Maybe not as you are.