I devoured all reading matter I could get my hands on, age-appropriate or not, understood by me or not.
This included magazines, advice columns in newspapers (I didn't care for current events, and still don't), instruction manuals, a household medical reference from the 1940's, my much older siblings' school books (especially science books and stories), Webster's Dictionary, a set of the Book of Knowledge dating from my father's childhood circa 1920 (talk about non-PC!), everything in the children's section of the tiny local library, and my mother's Year's Best SF Anthologies. One time, Mom brought home a big cardboard box full of Astounding Science Fiction magazines from the 40's and 50's and I devoured them all...no wonder I was less than impressed by the lunar landing.
Also, my mother brought home bound volumes of magazines from the 1880's so there I was, reading serials written for Victorian kids. Definitely an outlier influence.
Then there was the time I got into one of my mother's drugstore novels, a spy story I believe, and asked her what it meant when the man and woman got into bed and "their bodies melted together." I was about 8 and a half. She said I'd understand when I was older and took the book away. I never did find out how it ended.
Almost forgot - Jean Shepherd! "In God We Trust, All Others Pay Cash," "Wanda Hickey's Night of Golden Memories," and "The Ferrari in the Bedroom." Used to listen to Shep on my little tin radio late at night.