Double Chinese character jokes (funny and double are important)

I went to Shanxi on a business trip by train and came out of the carriage toilet to wash my hands. I didn't see the faucet switch of the sink. Ask someone else. Others replied: "Guess." This man is sick! I have to ask again. Others replied: "Guess." I can't help it I'll go. The man stopped in front: "I asked you to guess why you didn't!" " ""How could I have guessed! " I said. The man still stopped in front of me, pointed to the bottom of the pool and said, "Step on it with your feet! " "