My partner of 8 years, age 28.... in his spare time likes to meet up with his friends. Pretty normal, however when he is out they tend to meet up and go for a drive whilst doing balloons. By balloons I mean sucking nitrous oxide out of them to get high. I just think its pathetic and embarrassing that a grown man wants to do that in his spare time. we often argue about it and he says its just a way to make him feel better when he is stressed. I know people will probably think leave him but its easier said than done when you care about someone. I would say he does this happens maybe once, twice a week maximum and not sure how I can get him to stop.