IMHO, most people out there that smoke dope don't do it correctly. And in a group, blunts and joints get rolled, and people will suck til their heads spin on them, making the cherry get HUGE and incineration my two-leafed work of art. For that reason (and that reason alone) I tend to smoke by myself or with my best friend (we sell each other dope at half-price, depending on who's playing the role of dealer this week) or with my girlfriend. Apart from that, I'm not very social in the first place, so a lot of my smoking takes place alone, which is fine with me.