They're probably afraid you are setting them up.
lol.
My family on my mother's side, 100% Norwegian, all seem to have a large tolerance re opiates. They were trying to euthanize my grandfather with morphine and he kept sucking up fatal doses and wouldn't stop breathing. It's that good berserker blood. I've had Docs try and put me to sleep for an in office procedure "you won't be all the way under, but you'll sleep through this no problem..." and nothing. I'm sitting there reading magazines going "just do this. I haven't got all day."