Depends on, if he is psychical addicted to it, or if he is able to use it, just like I expect him to use alcohol, for special occasions only.
I dont mind anyone, maybe smoking pot once or twice a month on weekends, when meeting friends. Additional as I dont care for special occasions like visiting festivals or whatever.
Just as a beer from now and then is nothing wrong. While needing a beer everyday, already is a sign of an at least psychical addiction. Around here smoking pot is still illegal, but as long as you are only an non-criminal "from now and then weekend and festivals"-user, police doesnt bother.(As long as they dont catch you driving while being potted. Or you smoke it in public areas, ....)
For a psychical addicted potsmoker, having the need to smoke daily, to make a day a good day, I had no interest. I have experienced myself enough, how that drags you down, and I know as well, that noone but you can do the desicion about stopping to do so or not, so all that "Only waiting for the right girl to stop smoking..." is simply lame excuses, so people can reject their own responsibility about smoking or not smoking, and give themselve an illusion, that other people were responsible for that. " So I would have stop smoking pott immediately if they right girl had come my way, but its not my fault, that this didnt happen...." If YOU smoke, then because YOU do it, and thats simply noone else but YOUR fault and noone else but YOU is responsible for that..."
Yop, I do smoke from now and then, but you never will hear a lame excuse from me about it. I smoke, because of my desicion to do so, and not because the evil fortune, hasnt sent my prince yet, that shall save me from doing so. ^^ As well as I dont mind meeting someone, smoking weed or drinking alcohol for fun in moderate amounts from now and then, but would reject someone smoking weed or drinking alcohol regularly.