Parenting while a smoker

when i said if getting a dog high if he likes it is not annimal cruelty somebody said "it's like saying a 5 year old kid ate the special brownies and liked them so now might as well give him weed." and thats a good point and it got me thinkingif your a parent that smokes weed do you tell your kid you smoke when, how at what age. or would you just lie about it and be a hypocrite smoking in your room. do you let him smoke with you of course not at a young age but at what age do you think so.im to young to be parent but just wndering what other parents that smoke think