Felicity Jones was recently a guest on The Graham Norton Show promoting Rogue One. Mr. Norton encouraged Ms. Jones to go into some detail regarding a fan who had a likeness of Jyn Erso (her Star Wars character) tattooed on his calf. Felicity found it to be quite embarrassing when Graham insinuated another body part.
When a person blushes due to embarrassment, a good percentage of the time, they will cover a portion of their face (typically their mouth and/or eyes).
It's not uncommon this will progress further to involve greater portions of the face, head and body. This covering behavior can thus be thought of as an embarrassment amplifier.
In this moment, Jones temporarily covers herself behind Dawn French.
It follows then, that when a person displays facial or body covering during embarrassment, there is always blushing present (yet the reverse, of course, is not always true).
Those individuals who blush, as well as those who display facial-body covering during embarrassment blushing, will tend to have higher overall sincerity (higher sincerity quotients) - not just for that moment - but as a long term personality characteristic.
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