Two children were sitting outside a clinic. One of them was crying very loudly.

2nd Child: “Why are you crying?”

1st Child: “I came here for a blood test.”

2nd Child: “So? Are you afraid?”

1st Child: “No. Not that. For the blood test, they cut my finger.”

At this, the second one started crying. The first one was astonished.

1st Child: “Why are you crying now?”

2nd Child: “I came for my urine test!”