Tell them specifically you do not use pills, because of .. (make up a story) like because my father used to come home and beat me because he was always crazy from his pills he took or some sob story. I would reccomend saying you would like it because you have a couple reasons, but not too many. brainstorm and choose best 3 or 4 possibilities, and why they MM would benefit you. Come at it professionally, I guess. So Depression, anxiety, chronic pain, etc? But specifically say you do smoke and have smoked for numerous years, because that is what was reccomended a few years ago by a physciatrist in another place, but you never went through with it, and say you are currently using because you do not believe in pills, and thats what you use, but don't want to deal with the hassle of being caught for your own medicinal reasons. Hope this helps. :/