what are we answering? i:ll answer if you tell me what the options are
You could say something along the lines of:
"Hey, Friend, what's so good about weed? Why are you always smoking it?"
If he's smoking it for medical purposes, then just drop it, but if it's illegal and he's doing it to "look cool", then I would further ask questions about it.
Answer: produces estrogen - ovaries
Develops the immune system in childhood - thymus
Explanation: