I love yoga pants/leggings, and I believe most heterosexual men would thank me for that. But let's be honest here, one of the biggest reasons they're so loved by the masses (emphasis on mass) is because you can squeeze yourself into a pair several sizes smaller than you should be wearing and then go around telling people you fit into a small/medium when you should be in a XL. Spandex/stretchy blends are the new vanity sizing.