Why are pale & dark skin considered less attractive?

peace-love-couture
Pale girls or girls with very very fair skin feel the need to tan and girls with darker skin feel the need to bleach. Why?

It's just skin color. I'm not light but I'm not necessarily dark(y'all could be the judge though cause I had a pic on my profile). But I don't understand why either are considered less attractive?

sad, but uh link
Why are pale & dark skin considered less attractive?
21 Opinion