Or consider the time I was on my first safari in Namibia. We all trundled into the jeep and sped away. The first zebras we saw were breaktaking. As the trip continued we saw more and more animals, but lots of zebras. By the end of the trip we'd see movement in the brush, and the inevitable conclusion, "It's just more zebras".
It can even apply to the wonderful feeling we get when someone slips us a love letter. It's grand and we savor the moment. But if they start sending note after note, leaving messages, and calling all the time, we quickly lose that lovely feeling. Then the word "stalker" jumps into our mind. All because the quantity was wrong.
Quantity counts, up to a point. After that point we start rapidly reducing the value of what was previously so valuable. Beware of the quagmire of quantity.