Martha,
I don't mind your 'obsession' being placed on me at all. There is little I love more than debating these things and tossing around ideas, so by all means let us continue!
You are correct in saying that emotions do not affect animals in the same ways that they affect humans. In rare instances, such as a mother losing her baby, being singled out from the herd, etc, animals can have adverse medical effects due to their emotions, but it is not on the same scale as humans at all. This is because animals lead much more natural lives than we do. Their lives and emotions are dealt with on a much shallower and less complex scale.
Haha, I must have skipped over the 'love' part, but I assure you it was not on purpose. Mmmm...my 'sappy romantic girl' side is just as alive and healthy as any other woman's, so this isn't going to be pleasant, but I'm going to attempt to break the emotion of love down into a sort of psychological analysis. Love, towards a person, is an exceptional feeling that develops due to the release of certain endorphins. Love between a mother and baby stems from natural bonding elements within our brains. Love between a husband and wife, or two friends is certainly different, as they don't have that chemical connection. Theirs begins with our human need for companionship. We are highly social creatures, and so seek to surround ourselves with others who complement our personalities. Out of this 'group of friends' it is not uncommon for a favorite to be chosen. I ride horses, and have been around them for many years. I can attest that even horses have 'best friends' within a herd, and figure it is similar with other animals. Friends make each other happy and make each other laugh-- both of these are actions which release favorable chemicals in our brains, causeing us to relax. This sense of security also brings us closer to our friend. This person is then labelled to us as someone who provides positive feelings when you're around them.
Alright, we've got 'positive feelings'. Now, how do those turn to 'love'? Well, what is love besides a really, really, really positive feeling? I think it is the evolution of these simple positive feelings over time. This evolution occurs as one becomes more and more emotionally dependent on their 'best friend' figure. It grows to the point where you really cannot live without the person, because they provide you with happiness and support which you have correctly deemed as necessary for your mental well-being. As far as husband and wife go, (or wife and wife, etc., if we're being politically correct here), they have an extra boost as well due to sex. Sex releases bonding chemicals much like those found in a mother/child relationship. Not that two friends do not become chemically bonded over time as well, because they do. Happiness and such positive feelings release endorphins. In truth, all emotions release chemicals in one's brain, but the purpose of the negative one's is to do the opposite of bond.
Lighthouse,
I'm not trying to make anyone *prove* anything to me per say... well maybe I am a little, but my main purpose is to just ask questions and see what people have for answers.