What do you think of smoking?

I never smoked, but today I bought cigarete and smoked it. I hated smoking before, but I don't know why these days I want to smoke .

what do you do what do you do 是什么意思? For what do you do? what do you like ? What do you mean~~~ what do you want? What do you think_________? what can you do?? do what you like or like what you do? what do you learning English