No way. Never. Peeing is one thing. Floating a brown trout in your suit is just wrong. The only reason I could ever see that happening is if you had diarrhea and had an accident. Even then, you should take the suit off if you are feeling ill.
exactly - barring some flash intestinal disorder, there's no justifying the lack of control. i mean, do you occasionally drop one in your pants while strolling through the mall?