The Pilomotor Reflex, also known as the "piloerection reflex," is a response by the body's sympathetic nervous system that causes the hairs on our skin to stand up. This response is typically seen in animals as a means of making them appear larger and more threatening to potential predators. Synonyms for this reflex include "goosebumps," " gooseflesh," "horripilation," and "cutis anserina." While this reflex is usually associated with fear or cold temperatures, it can also be stimulated by emotional responses such as excitement or pleasurable sensations. Overall, the Pilomotor Reflex is an important physiological response that helps our bodies respond to various stimuli in our environment.