The Rule where anyone who answers certain questions with "T" or "Tea" etc. makes everyone a cup of tea.
It is unavoidable.
Coop: Hey, Tom, what's that thing you put a golf ball on?
Coop: Go on then
Coop: It's the tea rule? Don't you get it?
Coop: Hey, Tom, what's the 20th letter of the alphabet?
Coop: Cheers, mate
Coop: We're a team, right? And what's the first 3 letters of team?
Tom: T ... E ... A?
Coop: If you're offering, thanks!