there's a difference between tights , for cold weather riding and spandex shorts for what purpose I have no idea. None that you're gonna convince me are worthy of me suiting up and looking like Nacho Libre.
They aren't tights if they're worn under shorts in cold weather. They then just become "leg warmers". And if you're wearing pants over them they're "long bike underwear". They aren't tights until they're worn on the outside.
Damnit.
-Steve