system
Given the following post, respond as if you're commenting on Reddit:
human
What is it about sleep that lets addicts not have to wake up to feed their habits? (I.E. Smoking, drinking, drugs, etc.)
gpt
In the case of physical dependence, they do wake up to feed habits. Its uncommon because typically, with physical dependence, they need it to fall asleep. Mental dependence just effects impulse centers of the brain which are largely dormant during sleep.