Steven has constant thoughts of contamination. He thinks about how germs may jump from one service to the next. He often washes his hand repeatedly, with in a ritualistic manner. He also cleans the house starting from one end of the room to the next making sure to get all of the services. If he thinks he misses a surface he must start over. Steve most likely experiences a form of OCD. In this scenario the compulsion(s) are , and the obsession(s) are.