I’d be happy if they were classed together - and adult human beings were not penalized in any way for putting any of them into the one thing that unambiguously belongs exclusively to themselves: their own body.
I am pretty sure we all know at least one person addicted to caffeine and at least one person addicted to opiates, too.
I am pretty sure we all know at least one person addicted to caffeine and at least one person addicted to opiates, too.