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 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 have come for my urine test!