instinct vs pose

instinct:

Reflexes as instincts

Other examples of clearly instinctive behaviors include many reflexes. A true reflex is distinguished from other behaviors by mechanism; they do not go through the brain. Rather, the stimulus travels to the spinal cord and the message is then transmitted back through the body, tracing a path called the reflex arc. Reflexes are similar to fixed action patterns in that most reflexes meet the criteria of a FAP. However, a fixed action pattern can be processed in the brain as well; a male stickleback's instinctive aggression towards anything red during his mating season is such an example. Examples of instinctive behaviors in humans include many of the primitive reflexes, such as rooting and suckling, behaviors which are present in most mammals.

pose:

1. To assume or hold a particular position or posture, as in sitting for a portrait.

2. To affect a particular mental attitude.

3. To represent oneself falsely; pretend to be other than what one is.