Physiologically,
blushing occurs when an emotional trigger causes your glands to release the hormone adrenaline in your body. Adrenaline's effect on your nervous system causes the capillaries that carry blood to your skin to widen. Since blood is then brought closer to the surface of the skin, it causes you to
blush.When
we are attracted to
someone, blood will flow to our face, causing our cheeks to get red. This happens to mimic the orgasm effect where
we get flushed. It is an evolutionary way the body tries to attract the opposite sex. This is why women wear
blush.