I hate thongs. In the rare instances (and I mean rare) that I have worn them, I had a constant urge to pick the wedgie I had.
Needless to say, they did not stay on more than a coupla hours when I did actually wear them.
If panty lines are an issue, I will wear no panties. As a matter of fact, the VERY first time RG ever spanked me, I had on NO panties!
(I wasn't expecting a spanking....lol)
g.