Alex obligingly leads the way to the kitchen, but Simon has other plans: "In our bedroom. On a plank that's two metres off the ground."
"Eight metres off the ground", suggests Alex.
"Even better!" Simon responds, and off they march to their bedroom, and the game begins.
As I begin working on my online course in the living room, I hear lots of giggling and laughing coming from their corner of the apartment, and I only catch a few words and phrases, but one of them is this, from Simon: "That's so 21-century, we got to get into the 19th century."