Pipes and/or pipe smoking is sometimes called pretentious, or unpretentious. How so? Pretentious means claiming a position of distinction or merit especially when unjustified. I think it is maybe that the pipe gives the impression that its smoker is pretentious. I was once complimented by my local independent pipe shop owner for smoking an unpretentious pipe (Savenelli unfinished 404 zulu with more than a decade on it). My wife likes a Casano unfinished briar Calabash shape (or is it a Dublin) for being unassuming. But wait. Does that mean the guy at the pipe show smoking the Cavalier shape or a clearly very expensive artisanal pipe is pretentious? What position of distinction or merit is he claiming other than presumably owning the pipe in his mouth? I think this is a tricky usage. It's the pipe smoker who may be pretentious, and the pipe may be a prop in that, but I'd be cautious about judging.