I disagree with the other posters. I routinely encouraged my daughter to start smoking when she was 12 years old, even though she really didnt want to at first. She was having trouble adjusting to a new school and finding her identity as a pre-teen, so I strongly encouraged her take up smoking for social reasons, even though I myself am not much of a regular smoker.
Guess what? It worked brilliantly. She made regular smoking a defining part of her adolecent self-image early in middle school, and by the time she was ready to start high school she was a confident, self assured young woman, who smoked almost two packs a day by age 15, and never had any problem finding dates with older boys.
Now she's almost 19 years old and although she remains as committed to chain smoking as ever, honestly, she loves it. After she left school, she got a job working mostly from home, to provide for her habbit, which is now upto nearly four packs a day. Moreover, her heavy smoking hasnt prevented her from being a wonderful mother to her three beautiful children. This lucky grandma wouldnt trade any of my daughters smoking for all the joy those grandchildren bring, so if chainsmoking continously throughout the day makes my daughter happy, then Im all for it. I just hope she can give me a 4th grandbaby before my 40th birthday!