It takes just one puff. The nicotine attacks the pleasure sensors in your brain, causing immense pleasure, causing the addiction because when it is deprived of nicotine, it's going to crave more.
I recently used Sharepod to copy my cousin's 3000+ songs onto my Computer and into iTunes. Now whenever I play a song that came from his iPod, it will start from the place it left off. As in, I'd start listening, skip it, listen to it later and find it starting somewhere other than the...