I have a skull-shaped meerschaum pipe my wife got me a few years ago, and I'm a little concerned about it. I don't smoke it often, mainly because it has a questionable smell coming from it when I smoke it. I've smoked two or three different tobaccos in it and I've also smoked the same tobaccos in other briar pipes. I don't get the same "aroma" from them in the briars. The scent is not overpowering, and only noticeable to me, but I'm embarassed to admit that I keep smoking a pipe that faintly smells like a septic tank. I keep hoping it'll go away with use. Any possible explanations?