Two issues, health, which is addressed by sanitizing properly, and legacy, which posits that you are either "smoking someone else's pipe" or smoking the pipe of a dead person. I have only one pipe which I did not buy new, but it is one of my flagship pipes. The former owner is alive, well, and prosperous, so I am hoping that is contagious. I will say, when pipes get some real age on them, twenty years or more, they really do hit their stride. There's breaking in a pipe, and then there is having a pipe attain its full potential over time.