Read him the Bible.
My mom gave Grasshopper an edition of the NIV of the Bible for Christmas. She smiled as she said "I have to warn you, that this is a very dangerous book. it is very subversive and will give you many dangerous ideas."
So Grasshopper, who is very interested in things spiritual asked me to read it to him. So I read a little every night.
We began in Genesis.
We recently finished the story about how Lot's daughters got him drunk and comitted incest with him, after they escaped the city God destroyed, where Lot offered to let a crowd "do whatever they wanted with them".
He was also not too impressed with Abraham repeatedly lying about his relationship with his wife to save his own skin such that she ended up being claimed (however temporarily) by other men.
Revolted, Grasshopper said "I see what Grandma means about this being a dangerous book."
LOL! I'm certain that's not what she meant...but I think HE'S getting the right idea.