Wow, these threads are an eye opener for me. I can't imagine someone not seeing a movie until they were 18. I remember the first movie I saw when I was 4 years old some 55 years ago. It was "The Best Years Of Our Lives" in 1948. True! I remember seeing it with my grandmother. I dont remember all the details at the time, but I know it was the movie, because I remember Harold Russel playing the sailor with the hooks for hands. After that I was hooked (no pun intended) and spent most weekends in the movies.
Without going into a long diseration, like I sometimes can. I really miss the movie of days gone by. Back then you had actors instead of movie stars, and movies survived on the talent of the actors and not the special effects.