I love thong tanlines on myself and on women and at same, women like tanline on myself so seem that everyone love thong tanlines.
Few days ago i noticed a girl in low rise pants and was evident that this summer she was in high rise thong! I also asked how young girls can stay bare belly with less than 15 °C but off topic.
I also found very easy to have a well defined line with "Normal" thong but very shaded with G-string and minithong with string side. Recently i opted for string sides and g-string trying to keep the strings in position. Partially successfully only.