I certainly do have some pipes that are unsmoked. It's not that I have any rule about not smoking them - I have never bought a single pipe where I said "I will never smoke that one."
The fact is I am a pipe smoker who is also a pipe collector. Some pipe smokers view a pipe as a purely utilitarian object - a device for lighting tobacco and nothing more. And there is nothing wrong with that view. Many people view a car as nothing more than a mode of transportation - according to this line of thinking, a Toyota Prius is no different than a Duzenberg (well, except that the former is more reliable and therefore more desirable). There is nothing wrong with that perspective, but it's just not mine.
I love the aesthetic beauty of a pipe as a functioning piece of art. I love to see the different perspectives carvers have on shaping, grain exposure, blasting styles, shank treatments, stem composition, engineering - the list goes on and on. It is hard for the Duzenberg collector to explain to the Prius driver why he likes Duzenbergs, and I would be foolish to try to do that.
Because I am a collector and a pipe smoker, I tend to collect more pipes than I could possibly smoke. I may decide to smoke the pipes I acquire right away, or next year, or not at all. It's not that I ever say that I would never smoke them, it's just that smoking a new pipe takes time and energy that I don't always wish to devote to the task at that moment. It is far easier if I just want a smoke to grab a broken in pipe off the rack then to devote the considerable time and attention to breaking in a new pipe. Much of my smoking is done while I am working, with my attention focused only at the task at hand.
And if I am going to smoke a new artisan pipe for the first time, I want to choose just the right moment to do so, when I can savour the experience and revel in it.