Sure, I've heard the stories before, don't try and teach your husband or wife anything. Too many emotions in play, territory at stake, past grievances etc. etc.
Still, I thought I'd try teaching my wife a little navigation on our first sailing trip together, and it worked amazingly well. One afternoon we had quite a tricky harbor approach with confusing marks and some nasty bars, but I sent her to the wheel and indicated the lights and buoys as we worked our way in.
On our way back out a few days later, she again took the wheel, and when I tried to point out the marks in some of the more difficult spots, I found that the navigation lesson had already taken. Without so much as lifting her gaze from the channel ahead, she coolly said, "I brought this [fine] boat in and I can [jolly] well bring it back out again!"
Isn't it wonderful to work with a fast learner?