Wearing two pairs of tights is not a common practice for most people. However, there may be a few reasons why someone would choose to wear two pairs of tights:

1. Extra warmth: Tights are often worn in colder weather to provide insulation and keep the legs warm. In extremely cold temperatures, some individuals may opt to wear multiple layers of tights for added warmth.
2. Sheerness or opacity: Sometimes, a single layer of tights may not provide the desired level of opacity. By wearing two pairs, one can achieve a more opaque or less sheer appearance, especially with lighter-colored or thinner tights.