I also have heard that boys bond with females and females bond with boys, AND have found it to be true. While all of mine have seen me as pack leader (my hubby is a push over), the boys definitely bonded more with me and were more affectionate and less moody. Obviously, that doesn't hold true 100% of the time as many of the YT'ers with affectionate little girls will tell you.
When thinking "Yorkie", it's so easy to think of bows and clothes. But come on!! - When Coby wears his polo shirt, the girls just swoon.

I currently have 2 son "furkids" and they're the BEST.