1. It was the past. Perhaps they were younger when they were on social media. 2. It is none of their business. Whatever goes on in their social/private life shouldn’t affect them. I’m not so sure about a 3rd one, but that’s all I can think of :’)
Gawain wears the green girdle as a symbol of his weakness - he failed to finish what was asked of him, and he started wearing the girdle to show his failure.
