Everyone has there own poison downandlonely , or the majority of people anyway . Be that drinking , smoking , amphetamines, barbiturates, coffee , etc etc . Some are worse than others I guess , but they all follow a similar pattern . After a while you consume them to stop your brain complaining to you that you haven't consumed them yet . A portion of your brain is always trying to convince you that it would be a good idea to have (insert your own poison here ) . Once you do , you feel better because your brain leaves you alone for a while ... but then soon enough it will begin again . You have feelings and thought that if you stopped ( enter your poison again ) you won't be the same person , you won't be happy , you will feel loss .
Or at least that's my perspective from my several years of formal education at the bush primary school 😀