Two children were in a doctor's waiting room...

Two children were in a doctor's waiting room. The little girl was softly sobbing.

"Why are you crying?" asked the little boy.

"I'm here for a blood test, and they're going to cut my finger," said the little girl.

When he heard this, the little boy started to cry.

"Why are you crying?" asked the little girl.

The little boy looked at her worriedly and said, "I'm here for a urine test."