The best thing you can do while your house is being shown is make yourself scarce.
Have you ever shopped in a store where the clerk works on commission?
They always seem to be lurking in the background, watching every move you make, while you are shopping. This scenario doesn't really put you in the mood to buy anything. Does it!
It can be very uncorfortable viewing a home when you feel your every move is being watched. Making a Buyer feel very comfortable in the home is absolutely essential. The Buyer really doesn't want to ask you any questions..they feel you are biased. If they have questions about the home, they will ask the agent.
You have carefully hired a Real Estate Agent to represent you and your home. Who better than a qualified REALTOR to be your spokesperson.