0 = you've literally just had a piss and couldn't go again if you tried
5 = could go, but if something's diverting your attention could happily hold on a while yet
10 = if you don't go NOW you will piss yourself
Think I'm probably fairly tame and don't go much past a 6 under normal circumstances. Might go as low as a 4 if I'm bored at work.
Only hit a 10 once. Driving along (not a motorway) and it just built and built to the point where I pretty much crashed the car in to a field, dived out and was pissing before I'd fully got control of the situation. The damp waistband of my boxers was a reminder throughout the day of the incident. Bit rank.