Now this one is one of my favorites

My dad asked me the other day about this painting.  He asked me, "What were you feeling at the time to make you decide to use this colour?"  "Honestly?"  I said  "I hadn't used this one yet"  He laughed.  Really, when I did this one, I was feeling okay.  Could it be?!  Have I discovered a cure for Crohns?!!  :-P