The key is not to break the seal. Once you pop, you can't stop.![]()
I start struggling after 3 pints but I have to try, otherwise I'd be up and down after every glass.

The key is not to break the seal. Once you pop, you can't stop.![]()
I usually find that with me the process just goes -
Beer - Beer - Beer - PEE! - Beer.............and so on.
I would've thought the bladder would have stretch receptors like in the lungs - i.e. when there's enough fluid in there, the epithelial layer is stretched along with the associated nerves, and so the brain is told 'I need to pee' by the nervous system. I also imagine that's why if something leans on your bladder for whatever reason when you need to go to the loo like that it can feel quite 'intense'.
Proximity to toilet, the closer you are, the more you need to go.