myself i do it because loads of times when i smoke pure i get a tad too high (as in seeing patterns , hearing sound distortion all that trippy stuff) if i smoke pure. Also I like rolling with a lil tobacco better and I hate pure joints for going out all the damn time!???????? a dit:hehe I have never smoked mixes, just pure good green stuff. I've wondered why lot of european(??) posters are used to adding tobacco... I wouldn't do it but it must be a good twist in the flavor and high sometimes..