In Andersen's "The Shirt-Collar," a conceited shirt-collar boasts of his supposed romantic conquests, including encounters with a garter, scissors, and hair-brush. However, his arrogance leads to his downfall as he is ultimately discarded and turned into paper, serving as a cautionary tale about the consequences of vanity and dishonesty. Through the collar's transformation, the story highlights the importance of humility and integrity in our actions.