We should totally listen to kids when they say they have to go (pee) and stop the foolishness about making them hold it. Holding it is torture.
Life comes at you fast. You have to be flexible enough to find solutions to emerging problems. Just like clenched cheeks and squeezed big toes, you must be able to contract and relax accordingly. Relaxing in grave situations might not be the wisest decision and contracting at the right time can offer the ultimate relief. Strike that balance.