Hmmm, I was about 16 when I started smoking pot with my aunt, and the way I started was I caught the smell of pot in the air, and busted her ass in a joking way, but then I just said I do it all the time at my fathers, and after that been smoking pot with her ever since...So....I'm thinking a little jokin around, and then say something like how you did it all the time with who ever that might be close to you, (close friends/relatives if any), and he might let you smoke a joint with him, or a few bowls.

Good luck