Scott Adams insists being "married is a lot like being deaf":
If you hear the same person talking day-after-day, you literally lose the ability to hear what that person is saying. ... As I'm sure you've learned, it's impossible to speak to a spouse if he or she is near running water, or using power equipment, or concentrating on something else, or eating something crunchy, or wondering if the squeak in the distance is the cat dying, or there is a child within a hundred yards. Amazingly, that covers 90% of every conversation you might attempt at home.
Recently I discovered that spouses, like computers, must be booted up before they can hear what you say.