Yo phelan, I can tell you from one dude to another that I know exactly what you mean.

Now the answer to your problem is; it has all to do with the prostate. Now if you have a full bladder prior to sex, then the prostate has to do twice the work. As a general rule of thumb it's always best to clean out the pipes before hand.

That way the prostate only has to worry about keeping "it" up. Instead of having to do that and keep your urine at bay. It can become quite painfull as the urge to have a piss will get very strong.

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