When you have certain experiences

You respond with various emotions, Stimulus Response

Just that as this sort of stimulus

Produces this sort of involuntary muscle response

Well, that's a rather simplified suggestions

Of a complex mental process

But you get the idea.

Cause, Effect.

Nature endows us at birth with 3 general patterns of emotional response

Rage: Is the response to the primary stimulus of Thwarting

Something interfering with our behavior, our action

Fear: Is the response to loud noises, or loss of support

And the emotional response to Love

Is usually the result of a show of affection, or favors

Something interfering with our behavior

Fear: Is the response to loud noises, or loss of support