Addicted

I can go back whenever I want to............
and you still keep doing it.

Addiction.........

Addicted to nicotine, to alcohol, to tobacco, to coffee, to drugs, to someone, to food, to misery, to work, to pain, to the phone, to the internet, to shopping, to water, to chocolates, to whatever...........................
I have always wondered why someone gets addicted to something. Why can't they live without the thing they are addicted to?? and still they always feel they can revert whenever they want..... What is it?????
They will do anything for it. They will go anywhere for it. Pay whatever price for it.......
Is it only for the pleasure of it??? Is it in someones psyche??? Is it physical dependency??? Or is it something else???
What is Addiction???