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why. Your lips are red?
First of all, did you know that the outline or the border of your lips
(called the vermillion border) is a special feature of humans only?
This transition line from your skin to the pinkish-red part of your
lips is found only in humans—no one knows why. Your lips are red because......
because its a highly vascularized area (The facial artery is one of the six non-terminal branches of the external carotid artery.) due to its many functions like: food intake, erogenous zone, tactile organ, articulation, facial expressions
duhhhh...
