Harry Connick Jr. says he and his wife of 30 years have 'no rules' in their marriage

Jon Kopaloff/FilmMagic

• Harry Connick Jr. says he and his wife don't live by any rules in their marriage.
• "But when you say it's a rule, it's almost like we got to adhere to this. We don't really roll like that," he told People.
• Experts say having rules can foster trust in relationships, but it might not be necessary for everyone.

Three-time Grammy Award-winning musician Harry Connick Jr.