The scars on your back, that's where you grow wings (слэш)

Set in a AU-ish canon in which people get a scar for every lie they tell.
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Almost from the moment Loki begins to speak, he starts collecting scars. He wears them like a badge, like it’s something to be proud of instead of ashamed.
Loki is intimately pleased about each and every one that mars his golden brother’s skin; proof, all of them, that Thor is so not perfect and unreachable, after all.