Muddied experiences

This is an odd observation. Keeps trickling into my consciousness every now and then. It seems that the longer one lives and the richer the pallet of experience becomes - more difficult it is to get the pure, original experience. Let me explain - if I have never seen a waterfall - the first waterfall is the first "original" experience - nothing to fall back onto. The second, third, fourth - human nature is to say - aha, "this is just like..." Same goes for human experiences - the relationships, losses, arguments - one trickles into another. Yes, this is teaching us lessons, the whole "psychic determinism" concept rests on this in a bit roundabout way... but there is more to what I am trying to say. Life, inevitably becomes dull rehashing of things past. The new experience to matter needs to be so unique and powerful that chances of having the child's wonder drops off and the days get shorter... A little sad.