Replying to Parentals and Wedd

I didn't search bar this nor do I frankly give a shit... How do you go about convincing your dad to let you smoke at home and be open to the fact that you smoke weed occasionally? I jokingly told him that I was gonna go smoke pot in my room and he was like do you really have some up there (mind you he has never smoked in his life) and i said no. He then told me he would kick my ass if I ever did and make me move out! haha I just laughed it off and I still think it is funny. I've also been caught several times so he knows I have smoked. Also I talk openly about weed from time to time so he knows that I think it is completely okay to do so. Help me out here, thanks!