Father's day is coming up quickly, and to many that means shopping for one of the hardest people to shop for.  I never know what to give my dad on gift giving occasions.  He has no use for anything I make and like most people he buys what he needs.  One Christmas my mom gave me $20 and set me and a friend loose in the mall with the mission of buying my dad a Christmas present.  After wandering around for what felt like forever and not seeing anything that struck my fancy, I saw a coffee cup booth.  I was young and I didn't drink coffee, but I knew my dad did!  We had so many coffee cups in our house that I just knew he loved coffee cups and would appreciate a new one.  So I picked out a silly smiley faced mug and gave the lady my $20.  She gave me $5ish back in change.  I was done,...