Mary and I never had kids, but my brothers have done their part in repopulating the planet: six boys and one girl between the three of them. I won’t embarrass the kid or the father, but this is just too good not to share.
One of my nephews watched Beetlejuice about a thousand times when he was about 5 (as kids are often wont to do, though not necessarily Beetlejuice) and picked up a number of lines of the dialogue, including this one:
Well, he did it for his grandmother (i.e. my mother) and she just thought it was the cutest thing she had ever heard, and soon, every time he was around and there were people who hadn’t heard it, Nana Bunny would ask him “What does Beetlejuice say, sweetie?”
She stopped asking when my nephew, who had apparently had enough of Nana Bunny asking him to do the line for everyone, decided to quote another line from the movie:
And yes, he did the “honk honk” at the end…