In our childhood, may of us, must have read stories in book called Panchatantra. Still I remember one story from the book
Two foxes, while crossing the river were attacked by leeches. The leeches had covered almost entire body. The younger fax asked the older fox, should we remove the leeches?
The older fox said, No let them remain. They have sucked our blood to their full capacity and now they are satisfied. They won’t suck blood any more. If you remove them, again fresh lot of hungry leeches will attack and suck our blood again.
Time is changed, situation is not.