In the confirmation ring all the boys wear bows (like others said, usually read). My little girl Cali wears scrunchies only when she competes in agility and barn hunts and the little boys seems to usually wear boy colored scrunchies as well. 
 
I have a friend who shows Yorkies and their STUD wear bows, usually camo, all the time.  
When human males stop wearing earrings and hair gel, to style their hair, I'll start worrying about male Yorkies maybe
