I usually always have to go to the bathroom at inconvenient times. So my thoughts are usually "hurry the hell up", or something along those lines.
I usually am either on my phone, or I think about what I need to get done and how I won't procrastinate?but then i get up and procrastinate again.
Most people pimd on the toilet I think. At least two people have sent me pics of their pants round their ankles whilst sat having a dump or pretending to in order to skive work
After a while I think about if my crap already dried up and I have to use a moist baby wipe or if regular toilet paper is fine