It's wrong to look down on others.
Susan is going to go out to a fancy party with Emily, but Emily is wearing jeans and a tshirt.
Susan wants to attract positive attention.
Susan lends Emily a nice dress to wear.
Susan tells Emily she won't be seen in public with her dressed like that.
Emily wears the dress, and they go to the party and have fun.
Emily feels ashamed and goes home instead of the party.