1. Don’t buy anything that plugs in. Anything that requires electricity is seen as utilitarian.

2. Don’t buy clothing that involves sizes. The chances are one in seven thousand that you will get her size right, and your wife will be offended the other 6999 times. “Do I look like a size 16?” she’ll say. Too small a size doesn’t cut it either: “I haven’t worn a size 8 in 20 years!”

3. Avoid all things useful. The new silver polish advertised to save hundreds of hours is not going to win you any brownie points.

4. Don’t buy anything that involves weight loss or self-improvement. She’ll perceive a six-month membership to a diet center as a suggestion that’s she’s overweight.

 5. Don’t buy her a fire extinguisher.

6. Finally, don’t spend too much. “How do you think we’re going to afford that?” she’ll ask. But don’t spend too little. She won’t say anything, but she’ll think, “Is that all I’m worth?”