I somehow always thought it was like Walden said, growing devel horns. But I never really gave it much thought.

I learned in teaching teenagers that every single gesture and word has a meaning known only to them!

Here's how I understand the index and little finger.   < a href="http://www.mackbrown-texasfootball.com/pages/proudtrads/hookem.html">Hook 'em Horns!