Why are girls blushing so damn cute?
the old explanation is that a woman doesn't blush because she's being told something unfamiliar
rather, she is embarrassed that someone might realize she already knows exactly what you're talking about and probably understands it better than you
Because that's what happens to a woman's face when she's having sex (well to a man's face too).
The practice of putting cosmetics on the cheeks to make them look redder was common even in Ancient Egypt.
They are the best after all
She's not even blushing you subhuman.