I'm sure everyone is familiar with the system: one finger means you have to pee, two mean you have to poo. Yaty and I find this inadequate. Sometimes there are things that need to be done outside of the parameters that a simple number system works well with. Here is our proposal:
You'll see that 1-4 each have as many syllables as their number, for an easy mnemonic. Number five is the dreaded one through four. That one's tough and makes you drive like crazy in traffic. Thus we assume that most bad drivers in traffic are either a #5 or #6. Also to this list #0 constipation and #7 everything else. #0 should be obvious, and #7 is just borrowed from the recycle numbers.
Disclaimer The opinions expressed herein are my own personal opinions.