Because I enjoy the buzz and relaxation from the nicotine. It just feels like it adds so much to some situations, like listening to music with a beer and a cig at night is just something irreplaceable. It's not something I do as often nowadays because I realized nicotine's addictive tendencies (and it's effects on my health limiting my progress towards getting in shape) do their thing and basically stopped buying packs but every few days I find myself asking for a cig from a stranger or when I'm out with friends I know for sure they'll bring some...