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How to be a sexy library girl
Aim for contrast.
For example, the bottom section of your body should contrast the top. If you want to show your legs, your going to have to cover up top.
If you want to show legs, choose a dark skirt with a contrasting pattern. Don't be tempted towards the bare legged looks, unless your sure you can pull it off and don't go completely bare, try black socks, or dark legwarmers.