Are thin lips prettier than plump lips?

I was looking at old, OLD, (older than dirt) magazine adds and all of the women in the adds had the same look one feature I noticed was thin lips. They weren't lip less but they had thin lips. Today people go and buy lip plumper? Angelina Jolie is known for her famous full lips. Have beauty standards changed overtime? I mean at once fair skin was beauty now the tanning industry is booming. What do you guys think?