Subject: What's the use of fingerprints?

I've heard that only humans have fingerprints. Apes have much simpler patterns 
on their fingertips, as did our distant ancestors (experts are said to be able 
to tell if a piece of stone age pottery is fake by looking at the fingerprints).

If this is true - why did fingerprints develop? Darwinists tell us that all 
traits exist only because they are useful and give a reproductory advantage. 
What is the use of fingerprints?

Re: What's the use of fingerprints?