i dont think you realize how fucked up this is.
"my girlfriend wont lick my taint, but she sleeps with her tongue out, so i just ran it over her tongue while she was sleeping."
you dont just force things upon people because they're asleep. let your friend do what he wants to do with his body. its not up to you whether he smokes or not. if you actually do this to him, expect to lose a friend. hell, it doesn't even sound like you like the guy, so just leave him alone all together.