Question: During the dinner party, Bernard's wife compliments the Deetzes on what they've done with the house. Then Otho tells Beryl (beside him) that he hopes it wasn't one of her attempts at ending her life. I don't understand - is he changing subjects or does this have something to do with the new house?
Question: As I understand, Beetlejuice would come back to life if he successfully married Lydia. So why don't more deceased people marry a living person and come back? The handbook says that most of the living won't see the dead, not all.
Answer: Maybe the marriage requirement is for Beetlejuice in particular, just like him being released when someone says his name three times.
Answer: As you said, most living humans could not see or communicate with the dead. This appears to be a requirement for the deceased to return to the living world. Lydia had the rare ability to see and speak to the dead. Also, many departed souls may not want to return to the living world.
Answer: Otho was having a separate conversation with her, of which part was cut from the film. The shooting script has a part where he asks her why she was in the hospital recently, since the reason she gave was a lie.
LorgSkyegon