Look stoner Bros, we need to talk etiquette. Specifically, marijuana smoking etiquette. This is NOT 'Nam. There are rules -- albeit unwritten ones -- one must obey to not be a weed douche. For example, never criticize a friend's free weed. Don't brag about how great your rolling skills are. And, most importantly.... CHIP IN. At the very least, be a kindbud and buy your friend a beer. Or give him some Cool Ranch Doritos.
The dudes over at High Times recently dropped a video guide to pot smoking etiquette. It's well-worth the watch.