Unwanted Visitors...In the Shower!

I'm entrenched in writing a middle grade novel steeped in love, friendship, jealousy, bravery, cowardice, insecurities and loss.  If I try to read, instead my mind is doing character development. When I try to write a letter, my characters sit on the paper like a cat does on your keyboard.
I do my best thinking in the shower and I needed one, so I decided in order to straighten out my thoughts, I'd just go ahead and take one. So, was it slumber parties and body insecurities that show up in...