One of the first 'adult' books I read, around 8 or 9, was Jay McInerney's Story of My Life. The first line is as follows:
I'm like, I can't believe this shit.
(He didn't use quote marks, which I think is worse than profanity.)
This was the late 80's. I read lots of stuff- Judith Krantz, Jackie Collins- that would give 50…