I will take sense of humor. It is as common to us as breathing. No, it is not. It is a virtue. People who have a good (or great) sense of humor, they cultivate it daily. I find it an intriguingly effective technique to make your way out and away from the mediocrities of life.
In a relationship like marriage, we can survive without good for a day, we can make it without saying "I love you" for ten times. The difficult bit is to come to terms with the fact that we get back to our normal-selves without making fun of ourselves, or how stupid we looked back then. You need to address the issue but not before giving yourself an opportunity to laugh at it loudly/funnily. Your partner with good sense of humor can give you a hard time not to do things repeatedly the same. It is her unexpected reaction which would catch you with pants down.