How did and why would we evolve such that we receive enjoyment from music? Is this a more complex form of communication than simple speech, so that somehow musical hominids had an advantage over non-musical ones, or, could our fondness for rhythms be due to a memory of our mother's heartbeat, or even our own? Is the fondness for music a primitive or an advanced evolutionary trait - it seems to be common to man and beast alike, but do birds and whales really sing? How does music cause the release endorphins, or whatever happens when it causes us to relax while listening? In short, how and why do we enjoy it?