Tights don't flap in the wind and wick moisture away, keeping you warmer and no chafing. They also don't get caught in the chain. It's a tool, not a style.
Who cares what other noncyclists think?
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. “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche
"We can judge the heart of a man by his treatment of animals." - Immanuel Kant