Sorry if you misunderstood. My post is about illicit drugs in general.
But I wouldn't go as far as assuming someone of not being exposed to marijuana if I were you, especially if you don't know me. Anyway, the fact is potheads will always jump on the defence of marijuana being harmless, and the miracle weed to bring about benefits to the world around them. Back in my uni days in the US, a few friends of mine even claim marijuana to be able to cure cancer. No need to be so serious. Enjoy this joke:
Definition of a pothead: Someone who believes (1) any problem can be fixed by smoking marijuana, and (2) any activity is more enjoyable whilst stoned.
John: "Hey man, wanna hang out?"
Pothead: "Yeah sure, you wanna smoke a bowl?"
John: "I dunno man, my throat's been kinda sore lately."
Pothead: "Oh that's ok, a bowl will fix that."
John: "Really? Well I've got this Government test tomorrow too, so I probably shouldn't smoke."
Pothead: "Pot makes studying easier. You'll enjoy the subject more!"
John: "You're full of shit. Next you'll tell me weed can fix my chronic back pain and I should get high before visiting my grandma in the nursing home."
Pothead: "I'm glad you understand now. Got a lighter?"