Trevor can smoke a entire blunt in like 3 seconds
Jurgen would die if he even smoked a quarter of it
Dekker can't smoke weed cause he's a rabbi . But if he could, he wouldn't know what to do with a blunt. He would try to eat it.
Yes, yes, and yes. To add on:
The problem with Trevor is that smoking a normal amount of weed doesn't do anything for him. He has to smoke at least 5 blunts to feel as high as most people get from smoking like, one. He started when he had cancer for pain relief purposes, but now he continues even after being supernaturally resurrected because nothing else gets him to chill the fuck out.
Jurgen is just... a lightweight when it comes to any kind of drug. Just a complete bitch. He called 999 after smoking a quarter of Trevor's blunt. Unfortunately he wants to drink whiskey to look like a Cultured Academic so at parties he'll always be holding a glass of it and pretending to sip but he can't drink more because he knows he'll die.
Adelard: Initially thought the blunt Trevor gave him was a hidden explosive. Was very disappointed to find out it was food, apparently (???) and informed Trevor that he wasn't sure if it was kosher so he couldn't try it. He then got wistful over Gertrude because all of the apparent food she handed him was explosives, and he misses that.