Mystery #3Tier 2-3blood flow / temperature / balance
Why do you suddenly need the toilet more when you get cold?
Step out into the freezing cold, or jump into a chilly swimming pool, and before long your body is nagging you to find a toilet, even though you have not had an extra drink. Somehow being cold makes more wee. How does a shiver reach all the way to your bladder?

Your guess
Why do you think being cold sends you running to the loo?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
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