If you are wearing a thinner top, the seams on the girdle might be visible. Speaking from experience on this one! I have a couple of pairs of polyester blend trousers, and when I wear pantyhose or stockings underneath it tends to make a noticeable swooshing noise when I walk as the fabric of the pants rubs against the pantyhose on my legs. As far as 3 above, I did have one time about a month ago now when I was wearing my normal work casual wear, jeans and a polo shirt and a garter and stockings with shoes and no socks.
In school I was labeled as mentally gifted. There wasn't a subject that, if interested, I couldn't master. This came at the expense of a social life though. While other children played outside, I hit the books and the Internet. Whatever piqued my interest, I would totally engross myself in. I was also withdrawn when it came to girls. I had developed a sort of social anxiety.