I seriously don't understand how ppl can be addicted to stimulants (nicotine, meth, coke, etc... ).
stuff like booze, opiates, benzos, ghb, and barbiturates I can see, since there's physical withdrawal (and risk of seziures/death with some), but with nicotine/coke/meth, it's not like you're shaking and getting sick if you don't have it.