In my view Jesus was telling them, where is the man. The law called for both man and woman to be stoned. Where was the man and how did they catch her? They knew where she would be because each one of them had either been with her or lusted after her. Another reason Christianity is false, the concept that things related to sex, eating, dress, or other natural human things could have anything to do with something called sin or rule breaking. A god would not care about such trivial junk. Man cares about this sort of thing.