If you ever feel like you wanna poo-poo, the best CR you can go to is located at the 3rd Floor of ST Building, near the NSTP Department. That CR is barely visited by the students, so you need not to bother if people might see you poo-poo-ing. Plus, there’s always a pail of water in there and tabo.
Indeed the best CR to go to in case the nature calls you.