I read this line from a novel: "He reached into his pocket for a wad of tobacco and placing it in his mouth began to chew." "Steel spat a mouthful of the acrid tobacco juice on to the ground." I've never actually seen chewing tobacco, but tried cigarettes, cigar, and rolling tobaccos. Chewing tobacco is called smokeless tobacco. Is it same thing as the one in a cigarettes, cigar or sold in a pouch for rolling? Does chewing tobacco really do such harm to human mouth? Lots of scary pictures on the internet.