Continuity mistake: Lolita goes into Humbert's room and she is chewing gum. She then sits on Humbert's lap and sticks her gum on a piece of paper on his desk. A couple of shots later, she is chewing gum again.
Question: When Lolita enters Humbert's room for the very first time, she asks him if she's getting a zit. According to Google, zit was used to define a pimple circa 1966. The movie takes place in 1947. Was the slang used back then?