Not always. Why do we have earlobes? There's no reason for them. They just appeared, and weren't fatal, so they're still with us. Same with eye color, hair texture, fingerprints, and probably lots of other inconsequential items. We've inherited a lot of stuff. Sometimes it's really advantageous, and that will tend to show up more and more in future generations, but sometimes it's just meaningless baggage.
I don’t know about you, but I have earlobes so I can wear flashy but inexpensive earrings in hopes of attracting a suitable mate; one with the capacity of obtaining for me much more expensive earrings and other pieces of jewelry with diamonds, pearls, rubies, etc.
I don’t “need” my pinky toes either, but they look kind of cute in my sandals and they come in handy for games of “this little piggy”.
Seriously, some “parts” may not have a practical function use per se except for appearance; like lip shape and hair color or those parts that are just too cute, attractive or erotic to us, and the opposite sex for evolution to discard, like earlobes or pinky toes. But attraction between the sexes and it’s obvious consequence is very important to our survival.
I don’t know about you, but I have earlobes so I can wear flashy but inexpensive earrings in hopes of attracting a suitable mate; one with the capacity of obtaining for me much more expensive earrings and other pieces of jewelry with diamonds, pearls, rubies, etc.
I don’t “need” my pinky toes either, but they look kind of cute in my sandals and they come in handy for games of “this little piggy”.
Seriously, some “parts” may not have a practical function use per se except for appearance; like lip shape and hair color or those parts that are just too cute, attractive or erotic to us, and the opposite sex for evolution to discard, like earlobes or pinky toes. But attraction between the sexes and it’s obvious consequence is very important to our survival.