Perhaps my wife is marter than the average person (okay, I know she is), but she never had a problem understanding that the custom knives were not to be trated like Ginsus. In fact, she knew it intuitively. The KITH knife I got from Stacy has been used regularly, almost at every meel prep. I gave her the lecture about super charp knives and how to use them, but never had to say a word about keeping it out of the dishwasher. She knew it was special, and treated it that way.
We also have a set of Globals given to us by friends... none has ever seen the inside of the dishwasher. Same holds true for the Henckles.
I don't know why she knew intuitively to treat them differently... maybe she just watched how I treat them. Maybe she was trained by her mother to appreciate nice things.