i think addicts have less dopamine and they take drugs to have feelings.
or maybe you didn't get as much touch as an infant and you have some kind of addiction

Pathogenic overactivity of the dopaminergic mesolimbic pathway in the brain—forming either psychiatrically, during mania,[17] or pharmacologically, as a side effect of dopamine agonists, specifically D3-preferring agonists[18][19]—is associated with various addictions[20][21] and has been shown to result among some in overindulgent, sometimes hypersexual, behavior.[17][18][19]