I have tried to talk to ds's but neither are at all interested. Maybe because they are aware of health, have always played football, gone to the gym, ran 5K with their friends.
I have a very relaxed view of it, mainly based on it NOT being that bad, (apart from the horrible side of the whole drug industry itself obviously), in that most people who don't have very strong addictive personalities, can try something, at least once, and don't have to worry that it will necessarily lead to addiction.
I tried a few things whilst at uni, only a bit, a few minor things, a few different things, some only once. I tried to talk to ds's about it, but both are nonchalant, totally non interested. Ds1 nearly finishing uni, says most people he knows have fun, but don't rely on drugs or alcohol to do so. They do share beautiful experiences, eg pp watching the sun rise. But they seem to do it au-naturale, eg staying up chatting, to see sunrise, running down the beach in Florida ...