Emotions: What the hell are they?

For those of you who don't know me I am an extremely logical person and not necessarily in tune with my emotions like some other people I know. My natural personality along with life circumstances have made me more so logically yet I am fascinated with emotions and how they impact our lives everyday. Like they do not make logical sense. I don't understand how people can make decisions or have opinions purely based on emotions because they are extremely biased and fickle. Don't get me wrong I consider myself a romantic kind of guy and like all the cheesy cornbally things just as much as the next guy BUT i don't take it to the extreme like some people I know. Life is full of many difficult decisions and i just don't see how people can completely make decisions on their emotions.