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Taking Advantage - The Biological Basis of Human Behavior by Richard F. Taflinger

SELF-PRESERVATION AND HUMANS

...humans desire personal survival; seek food, drink, rest, sex; fit into niches; must adapt to changing conditions. 

Humans are subject to the same stimuli and reactions as any other animal. Hunger, thirst, asphyxiation, fear, and exhaustion are physical sensations that cause instinctive physical reactions. Most of these reactions are unpleasant, and people avoid the stimuli that cause them, or, if they're unavoidable, take actions to reduce them. Thus you eat when hungry, drink when thirsty, fight for air, run from dangerous situations, sleep. In any case, the reactions are good in that they tell you you're in a situation that could result in injury or death. These responses are instinctive, and we have no more control over them than we do over our eye color.

© Lauren Holly Best, all rights reserved