I used to wet the bed as a child. so why now that i'm an adult do i have the ability to contain it?

Nervous system chgs: One of the primary differences in children and adults is the level of connectivity of the nervous system. If you use the analogy of a ladder, the newborn has the top and bottom rung connected and takes their life to link up the other rungs. With additional linkage comes additional talents, including the ability to sense a full bladder and wake to empty.