Why does the bladder have a memory?

Question

When I get in the shower, my body suddenly wants to piss. Why does it remember that we often piss there? What’s the point?

In: Biology

Answer 1

That’s not the bladder, but your brain. The most likely cause, given the lack of details in your post, is old fashioned conditioning: do a pleasant thing consistently in the same environment, and your brain will associate that environment with pleasantness and do what it thinks will get it that pleasantness.

In short: you like doing it and are used to doing it in the shower, so now being in the shower gets your body ready for the pleasant habit you’ve built.