[CQ-Contest] 48 hour straight contest operation and human output

[Franki ON5ZO]

Gentlemen, forgive me bringing up the topic...
Quite a lot has been written here about how to stay awake for 48 hours. Some 
can do it, others can't.

What I really would like to know is: how do you stay in the chair for 48 
hours and ignore the call of nature? I don't think the human body can retain 
its output for 48 hours?

I see some SOAB reports on 3830 where the operator says he was on for 48 
hours.
Does this mean he ran away for some relief a few times but did not take 
these short breaks into account?
Do they have a 'special operating chair', if you know what I mean?

This to me seems harder than stay awake. 48h straight ops: how do you resist 
the call of nature?

73 de Franki ON5ZO