Studies find that teenagers are well informed about the risks of tobacco, but they also think that smoking is cool, that they themselves will be safe from harm, and that smoking projects a positive image to their peers. 1  So, the symbolic meaning of smoking overrides that actual facts regarding smoking and risk.
Alternatively, it represents a deterioration of your instincts. To dream that a dog bites your on the leg, suggests that you have lost your ability to balance aspects of your life. You may be hesitant in approaching a new situation or have no desire to move forward with your goals.
In a dream, a snake could be a symbol of evil, treachery, medicine, healing or wisdom, as well as many other possibilities. To see a snake or be bitten by one in your dream signifies hidden fears and worries that are threatening you.