As the majority of wine’s enjoyment stems from its aromas, gently swirling the wine can facilitate aeration, which may enhance the release of those aromas. Additionally, the introduction of oxygen through swirling can help dissipate undesired aromas, such as those caused by sulfites, which can resemble the scent of a burnt match or rotten eggs. By giving the wine a gentle swirl, these undesirable odours often tend to fade away.