Yes, I've read this kind of material before, but this site does a great job of explaining the concepts it is discussing visually. Magnetics/plasma/ether--most of these ideas overlap the notion that there is a bio electric field and that field interacts with everything else. The planets, the theory goes, are large bodies that influence how the electricity/gravity plays out in this solar system, and so influence the "magnetic water" or fluid into which a person is born and therefore shapes, in part, how they experience life.

Before Catholicism, it honored a Gnostic fellow. The Catholic church made it a holiday about love instead, and burned the Gnostics claiming they were heretics. Therefore, Valentine's day is always a day where people are tying into a type of passion play that ultimately worships Mary, the Mother, as a kind of equal to God and the Messiah. In short, fire.

That's a pretty broad question. The answer that I will provide concerns a more Vedic perspective. Vedic astrology is great for questions about the soul. Tropical astrology is good for questions about the psyche, which is how the psychology chooses to express the soul. Animals, as you might surmise, do not have the same kind of souls as people as a general rule. Some, however, might get closer than others. Introspection makes people different than the animals, and indeed, meditation is a kind of introspection which confirms the suspicion.