I'm sure that everyone has a secret no matter how big it is.
Play a game, a stupid game. No one wanna do it because everyone has a secret.
Game: put everyone's phones on the table while they're having dinner. When someone gets a mail or a call, share them to everyone. To make sure everyone doesn't have a secret.
Psychological warfare.
No matter how long they've been in relationships, people definitely hide something that no one knows. A secret could ruin everything that they've built for each other.
Can you share your black box to someone who you trust, who you love?
