I have to say that I'm proud of my bladder.
That's a unique thing to be proud of. Why are you proud of your bladder?
Because I always urinate on time
I think urinating on time is a thing that most people can do, so being proud of it is pretty strange. It might be best to keep those sorts of things to yourself.
At least I can.
That's true, it's good that you're able to urinate on time, but boasting about it isn't really necessary.