Why are some women natural born dominatrixes?

In particular, I've noticed this with young women (in their late teens/early 20s) who grew up as the only child. They were spoilt by their parents and have a charming bratiness and sense of self-entitlement about them which I find VERY attractive. My girlfriend for example, she is not a formal dominatrix but she is naturally very bossy. She orders me around with a complete lack of respect. I'm in my 50's and the CEO of a very successful company. But at home, I'm reduced to being a toy for her amusement. I'm her cook, cleaner and chaffeur. She has no qualms about bossing me around. Add in the haughty lift of her chin, the disdainful flick of her hair, her little self righteous pout.... And she has me wrapped around her little finger.