I dont think its really true. Some people say its the opposite females are closer to women and male to men. In my opinion it doesnt matter male or female dog because if you are the leader they will adore and listen and be close to you. Also yorkie are very affectionate creatures and if you show them your love they will show the same love back. I use to think the same thing as you before I got Maxi he is a boy. He loves me to death and attached to me. He is not attached to me because he is a boy he is attached to me because I am his leader. My friend's dog she is a girl was very attached to me. I was babysitting her for a week and when the owner came back to pick her up she told me later that her dog was depressed because she missed me a lot. They would say my name and she would run around looking for me with the toy in her mouth and crying( the toy I gave her). So in my opinion it doesnt matter on the sex of the dog. Be a leader and they will be yours truly. I have a boy and I cant wait to get a girl now