I Wet Myself When I Was Very Young.
My parents loved good deals. So much so that they would make a fairly long trip every now and then to Value Village to buy the cheap things. They took me, my brother, and sister along because we were much to young to take care of ourselves.
One time, I had to pee. I knew what my parents would say if I told them, something like "well be patient". So I didn't bother asking at first and waited. On the shopping went. I didn't know it was possible to lose control, but it was getting unbearable. I finally told them, and they asked me to be patient. I waited a while longer and reminded them and they asked if I had to go right now. Well I didn't believe so, so I truthfully stated "no" as much as I wanted to shout "YES!!!"
Well I waited longer, and then it happened. It just started coming out. I was frightened and didn't know what to do, so I tried to take off running to find a bathroom. My dad had more sense, so he held me in place to keep from spreading it. My sister kept screaming "He's wetting! He's wetting!" repeatedly, which made the situation that much worse.
We got into the car shortly after, my parents a bit unamused to have their trip cut short. But I hadn't finished wetting earlier in the store. Why should I have? I didn't even think it might happen again. But my bladder was still about full, and the muscle was weak. I couldn't even feel it anymore. But then all of a sudden I was wetting myself again, in the car.
My mom couldn't get me out on a trip longer than 5 minutes for the next few years.