Redskinluver:
What has come to mind is a M/M story
Oh, my bad. I guess you can skip practically all my stories in that case...
Redskinluver:
Can't say as I see much point in wedgieing a thong - its already a wedgie!
Well, to me the main point of the wedgie is that it strains pretty hard across the sex, which might induce certain emotions that combined with those caused by the spanking can result in an interesting setting. So pulling a thong might work, even if a central part of the wedging is to imagine how the panties slide up the butt crack.