I've had similar experiences when showing my best work to men who don't get it. It is disappointing at best.The following may be true: In their work lives they are used to giving a quick overview, searching material for errors and that seems to be what catches their thinking, not the whole effort. They are rather blunt in their reply. Don't give up enticing him to enjoy art...lead him in to the appreciation of the color, the design and remembering when you pulled material together. That will draw them into thinking more deeply....after all, this work is not their forte.