Well, they have shown Chidi experiencing stomach aches on at least a couple of occasions. So pain appears to be a thing still. Though I can't remember, in like the 3rd or 4th episode when Janet is using the arc welder while she and Michael are trying to find Chidi a new hobby, she comes at Chidi with the welder. When…

I think people in the good place still have sexual needs, if you consider that in the pilot that Janet asked what kind of pornography Eleanor would like her to search for when Eleanor inquired if her search history was private.