What does it mean when a woman covers her mouth?

[LinkxPeach]

The other day, a female friend waves “hi” at me, and cover her mouth with both her hands while her fingers are on her cheeks.

[__MisterGoneShiner__]

What kind of a description is that?
You mean her pinky fingers were on her mouth while her palms and rest of the fingers were on her cheeks?

If yes, It's the "seductive" mode.

[LinkxPeach]

That each palm was on the side of her cheeks, her wrists on her chin, and fingers on the back of her cheeks.

[__MisterGoneShiner__]

Seductive mode.

[LinkxPeach]

Oh, okay.

[Guy13]

Yawn or Surprise.

[Anonymous]

How would we know this?