Because some alien race that programed our ancestor's genetic code program it that way. Along with the self evolution and genetic information inheritence with it. No one designed your lips for you, but you developed it on your own anyway right? Thats just the save data the alien designed, working as intended.
https://phys.org/news/2009-04-fingerprints.html https://www.thoughtco.com/why-do-we-have-fingerprints-373445
Lips are a sphincter, like your anus (fact). The body is only so creative when it has tubes it needs to close.
T H A N K Y O U. T H I S S O L V E D O N E O F M Y Q U E S T I O N S. NEXT QUESTION:- Is love spiritual or chemical? (Hope I phrased it right.)
depend PoV~ what kind field of study~ there no agreement between scientist~ so far only theory~ further explanation how chemistry see it behold NUF Wizard! @Yukkuri Oniisan also you can ask about how love seen from physiology aspect and that's how a cat run away from the scene!
They kind of flap around on the front of your face, get dried out and chapped in the winter, and occasionally get caught up between your teeth and mistaken for food. Seriously, what good are lips? Birds get on just fine without them, turtles' lips have hardened into beaks as well, and while most mammals have lips, we humans are in a class all our own having lips that are permanently turned outwards. It turns out that lips are quite important; so important, even, that it seems worth the risk of having your bottom lip caught in between your chompers. Even though that can really hurt. Using our lips to suck is one of the very first skills we have after we're born. In fact, it's so fundamental to our survival that it's known as a "primitive reflex"; we're born knowing how to suck and no learning is necessary. That's true for nearly all mammals.