eli5: Why does the serious urge to pee not correlate with the amount that comes out

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So sometimes when the urge to pee is really bad it’s bordering on painful, like after a long sleep or car drive, not that much comes out. But then other times when I’m just chilling at home and go for a pee with no urgency I pee like Seabiscuit. What gives? What causes you to need to pee so badly it hurts cuz it doesn’t seem like it’s a volume thing?

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Anonymous 0 Comments

Doesn’t matter if I just peed 15 minutes ago, if my clothes come off (for shower, changing, ..other stuff) I have to pee NOW. I’m sure it’s been ingrained since diaperhood*, but 65 years later?

* If you’re a parent, you know.

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