Does it take more than one external stimulus to trigger cortisol in the bloodstream? I don’t mean to answer a question with a question. I postulate that our primitive ancestors used smell and sound as well as sight. What is the smell of an exam at school? Or even better yet driving a car isn’t a primal act of survival. Running jumping hiding I would say are examples of primitive actions. So driving may stress some people out but it hasn’t been around millions of years
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