When smoking with a friend or in a group there is a certain tweaker etiquette to follow. First take one hit then pass the piece. You can only take multiple hits without passing if you brought the dope or if there is another piece being past around. Next is never blow or spit into the piece, it will immediately make the dope disappear. It's a nebbie mistake, I've done it many times. Another and very important one is don't hit someone else's neck. The neck is the part where the stem and the bowl connect. People usually save this part and it's very disrespectful to just burn it. Blue flaming or torch, depending on how well you roll will determine how you light your piece. Last but not least don't pocket lighters it's highly annoying.