Flirting is tied to the limbic system, those ancient parts of the human brain that control survival-based drives, such as sexuality and all the emotions that come with it. Here, flirtation is less a social skill and more an impulsive behavior that takes our intellect hostage. A flirt-or-flight response.
But flirting isn't entirely instinctual either. It's also governed by cultural rules and social etiquette.