My husband once kept notes on an old laptop. I knew a password he commonly used and opened them. I expected random work stuff. Instead, I found journal entries about his anxiety, fears about becoming a father, and worries that he wasn't enough for me.
I closed it and never read again. But I can't unread what I saw. Since then, I've become more careful about how I joke about his insecurities. He thinks I simply became more understanding with age. The truth is I violated his privacy and learned things he wasn't ready to tell me.