All feelings can be traced back to old reasons, feelings are the main way and fast way of thinking, deliberate questioning and rationalizing or whatever will be tommorro's feelings. Feelings are also triggered by emotional ques that related to the reasoning and so help engrain the feelings and that if stimulus fire similiar emotions it can lead to triggering the similiar old reasonings but would be percieved as feelings. If emotions seek to stimulate themselves like an addiction then they would not give up any feeling readily that gives great stimulation and so should be questioned with reason in order to be strengthened or dismissed or modified for more accuracy if wanted. Reasoning can be skewed by emotions and be superficial in conclusions, or draw inferences and deductions based on what is best for oneself(without consideration for the whole) or what leads to more emotional stimulation or what feels best based on other less accurate reasoning that grew into feelings, etc... So my claim is that all feelings are reasons that have grown to be subconscious or reflexive and basically like outputs to the deliberate or conscious awareness to tell it how to respond to a stimulus and is a natural way for the brain to work faster with less effort and that most thinking is done in this way, maybe 99%. Of course if I didn't think much about logic I probably wouldn't feel this way and so who knows.