LIFE'S GREY WATER

The other day I was contemplating mountains of wonderful bubbles in the bathtub and the enjoyment that a bubble bath brings whether one is young or old. As the minutes went by I realized that there were fewer and fewer bubbles and I started to see an occasional grey patch.   Then another patch here and one over there and before you knew it there was just a vast sea of grey water with two knees sticking out.

Life is like that isn’t it?  At first you are young and vigorous with lots of bubbles in your life.  You might have a career,  a great circle of friends, you raise a family and you are having the time of your life.  As you navigate through your life, eventually you will see a few bubbles burst along the way as a family member dies,  moves away, or there's that lost opportunity, family rifts and so on but it takes a long time before you really see any grey patches.  But eventually you do see them and suddenly one day you look around and right in front of your very eyes there are very few bubbles left in a vast sea of grey staring back at you. 

But what I can’t figure out is what the heck do the two knees represent?