Did anyone read the book in school?

In 1972 or 1973, I had to read this book in High School. So I must have been around 15 or 16. I have since read the book again as an adult, and I notice the book talks about things like losing virginity and getting raped, and other very explicit things. There is the use of the word c*cksucker, and another diary entry starts off with "Another day, another blow job". I don't remember reading that stuff when I was in high school! Seems like I would remember something so lurid when I was that age. I can't imagine my teacher discussing it with all of us. I find it hard to believe my high school would have allowed the book to be read by us. I am wondering if high schools would have censored certain phrases out of the book. Would there be abridged versions? I sort of doubt it, because it was banned by many schools, so why abridge a book when everyone else was banning it? Does anyone else have insight into this?