"I read about my wife's affair in her diary"

That's how the letter started off, stating that the man had secretly been reading his wife's most intimate notes to herself.
"My immediate impulse was to slam the diary shut and try to forget I'd seen his name before it had a chance to sink in," he said.
Read the article here, then ponder the question. Do married people have a right to have secrets? Of any kind? Or should everything be exposed?