system
Given the following post, respond as if you're commenting on Reddit:
human
[Mr. Freeze] How does he go to the bathroom?

First off he lives in freezing environments, so all the water in the toilets would be frozen. Unless he uses an outhouse style toilet. 

And wouldn't the urine in him be frozen anyway? What about the fecal mater? That would be like trying to pass out mini icebergs. It would be quite painful. Maybe that is why he is so cranky.
gpt
Dr. Thomas Elliot, Arkham Asylum.


Victor Fries has most of his bodily functions slowed to a stop, due to his frantic experiments in cryogenics more or less turning him into what he is today. 

He exists in a sort of conscious cryogenic suspension and has no real need to eat, sleep, or expel waste.

During one of his very brief periods of confinement, the doctor more or less stated his body had adjusted to such low temperatures and prolonged exposure to heightened temperature (ie, room) he would become hyperthermic, suffer irreparable tissue damage and die.