True. I didn't even know about the scene until I read about it on this thread (like I said, I just started reading the PDF of the book earlier this week). I certainly wouldn't miss it if it were not in the film, or replaced with some other "bonding ritual". But it could be included through suggestion and innuendo, rather than explicitly showing it. There have been plenty of movies that have done similar things (A Time To Kill, Hound Dog, Fallen Angel, to name a few). Whether you like the scene or not, agree with Stephen King for writing it or not, or whatever, it won't make or break the movie if included or not.