Oh, stop it Neil. I never knew you can be so cheesy! Come on, please have some cheese crackers and that'll stop your cheesy compliments… Li, you're blushing!
Ron, who had pelted towards the ground to catch the Quaffle before it landed, pulled out of the dive untidily, so that he slipped sideways on his broom, and returned to playing height, blushing.
Harry could feel his face burning. Snape was pausing at the end of every sentence to allow the Slytherins a hearty laugh. The article sounded ten times worse when read by Snape. Even Hermione was blushing scarlet now.
“Ooh, you look much tastier than Crabbe and Goyle, Harry, ” said Hermione, before catching sight of Ron's raised eyebrows, blushing slightly, and saying, “Oh, you know what I mean—Goyle's potion looked like bogies.”
Physiological signs of embarrassment like blushing are a signal to others that we recognize our mistakes, and that we're sorry for them, a way to authentically communicate that we know we messed up.
Your blushing reflex is controlled by something called your sympathetic nervous system, which is basically the system that takes over when you panic and happens without you ever choosing to blush.
Feeling that she must get through the matter somehow, Jo produced her manuscript and, blushing redder and redder with each sentence, blundered out fragments of the little speech carefully prepared for the occasion.
On such occasions, Lucy was silent, but her blushing cheek and her bright, happy eyes showed only too clearly that her young heart was no longer her own.