Mysterious Incident

     After I made the round of the ward and got in the OPD, I found myself with some stool around my abdomen on my white coat. A nurse pointed it out. I was so surprised and immediately changed into another white coat. I figured out the reason, but I didn't know why. A little while later, the pharmacist came in the OPD. I found it on his white coat too. He didn't know why. We discussed the reason why our white coats were smeared with stool. We talked about the course we traced just before and tracked back. When I got into the nurses' station of the ward, I found a nurse with stool and detected the origin of the stool. The drawer front of the table in the station was polluted by the stool. The pharmacist and I had leaned against the table. The stool must have been attached at that time. However, God knows the reason why the stool was there.