I went to my biannual dental cleaning today and my dentist said: "you must be drinking a lot of coffee because your teeth are stained". I couldn't tell her it was from pipe smoking because she is my aunt and she would kill me and my mom would probably fly here from the Philippines to confiscate all my pipes and tobacco. So she lectured me about brushing my teeth and rinsing my mouth right after I consume anything that would stain my teeth. I thought that it would be a good thing to share in this forum. Rinse after smoking. After her lecture, I proceeded to drink some coffee and smoke my early morning pipe. At least I rinsed and brushed my teeth afterwards.