It depends entirely on the person doing the torturing. The traditional interpretation always seemed to presume some level of sadism on the torturers' parts. Though I suppose that would just be another version of Hell, if not: the wicked punishing themselves through punishing the wicked.

[ Something of an ouroborous, if you will. In any case, it's clear that Kim is speaking lightly; he puts no actual weight in this subject and despite all evidence to the contrary, still has a difficult time believing in Hell himself.

It's clear that he takes his next words equally as lightly, if not only because he doesn't believe in Heaven either: ] Wouldn't it be more sensible to be good enough to get into Heaven? I can't imagine they'd force you to do petty manual labour in -- what would you call it? Eternal enlightenment?

[ He doesn't think he'd like Heaven much either. There's nothing he likes doing so much that he'd want to do it for an eternity. ]