WIA,
Both but especially "deeply rooted self-esteem that manifests in the proper unconscious behavior"
James
Have you ever seen a jock around a bunch of girls? That's what it looks like.
He doesn't need to be particularly handsome, just handsome enough. His confidence is irratonal, delusional, and he doesn't really know any sort of "social boundary". And the girls just sort of fall into line in reaction, not knowing "how he's going to make them feel". None of this is about what he says, because the typical "dumb jock" doesn't say anything clever. His "vibe" makes others laugh, more so than his words.
The jock isn't thinking, scheming, calculating, or planning. He just is.
Naturals don't necessarily have "rock solid" confidence like a jock might. They might have domain specific confidence, the domain just happens to be women.
They are "naturally" good with women because they've mastered the subtext and nonverbal things. In terms of actions, it's a lot of what is not said, but what is done, and the situations he puts the girls in, and the emotional reactions.
In both cases, the girls aren't truly responding "logically" to the "words being said", they're just emotionally reacting - and both guys are pushing the reactions.
WIA