A: The doctor sent me over here to have my blood drawn.
B: Certainly, please have a seat and roll up your left sleeve.
A: What is this test for?
B: Well, today your doctor wants us to check your white blood cell count.
A: What does that tell him?
B: Well, if it is elevated, you might have an infection.
A: Will the blood test hurt?
B: It is only a little pin stick. I am going to put a tourniquet on your arm to puff your veins up.
A: Ouch!
B: There we go! I got the blood that I needed.