Up until we got Gracie I never had a problem with people asking Adie and Skeeter's sexes. Adie has long hair and a top knot while we keep Skeeter in a puppy cute. Next to each other anyone could guess which was which. But since Gracie came to live with us and since her hair is still real short people think she is a boy. We have puppia harnesses for them and hers is pink and white plaid but they still ask.
People also ask me if they are related but it is fun answering that one.
Adie and Skeeter are 1/2 sister and brother and Gracie is their mother.
Before we got Gracie someone asked me why Skeeter and Adie looked so different if they were brother and sister. The answer "they have different fathers" seemed to clear it up for him.
But I guess some people think that all yorkies ought to look alike!