Now this won't hurt a bit ...

(NOTE: The author is writing this in third person so it's easier to deal with.)
So this guy walks into a urologist because he's had trace amounts of blood in his urine for three years. All tests show that nothing is wrong, and he's been told that some guys just have traces of blood in their urine. But he goes anyway because his GP has asked him to.
And the urologist says, "Well, I think we need to look at your bladder, just in case."
"And how do we do that?" the big bald guy asks.
"Oh, simple...