What is it about the ocean?

Why am I so drawn to stand on the shore of the ocean and look at the waves?  To walk along a sandy beach with the waves almost reaching to my feet?  To pause at a tide pool and look at all the life that is temporarily exposed until it will once again be covered by water?  To breathe in the humid salt air?  To sit and watch the sun slowly set while I listen to the endless series of waves?  To share those feelings with someone else who understands?