Jasmine, your comments are almost factual, but you have overlooked the sphincter muscle (detrusor), located at the blader outlet, that, when weak, allows constant dribbling, or "lets g" long before the bladder itself is near full, also allowing the urine to escape. Either way, it is a big problem causing wetness.
Take care.
My bladder is particularly weak during the winter. It happens on my way home when I get to my door. I could not for the life of me hold my urine. So I had an accident right on my steps. How can I fix this problem?
Change Girl 81,
I'm no expert, but one thing I have read is that the colder weather in winter makes all muscles contract more -- including the bladder. So, if you're exiting your warm car, or are warm from lots of moving about, and an urge hits, you might think there's time to make it to the bathroom -- until you enter the cold air, or stop in it long enough to cool down! This has happened to me enough that I know it to be true... :)
As far as solutions go: I would suggest engaging in pelvic floor strengthening exercises, as well as emptying your bladder before going out into the cold. Staying well hydrated is supposed to reduce the kind of bladder irritation (brought on by the hot drinks we enjoy in winter) that could make an accident like you described more likely. I would also suggest wearing dark, textured clothes "just in case" (I tend to wear dark corduroy fabrics if I'm concerned about an accident), or wearing a bladder-control pad or absorbent undergarment in the cold months. While the latter may be a bit embarrassing at first, it has the benefit of adding another layer of warm clothing! :)