If your wife asks you what you think of a hat BEFORE she buys it, she's looking for your honest opinion. If she asks what you think of the hat AFTER she's purchased it, she's looking for reinforcement of her decision.
Assuming the hat is a genuine "Bose," you have a choice. Tell her the truth and sleep on the couch, or LIE LIKE A DOG and get a good night's sleep.
Jack
"People generally quarrel because they cannot argue." - G. K. Chesterton