I'm lucky to live in a country were almost all the girls wear almost only thongs. My ex-wife wear only thongs and some very small VS cheekies that fit almost like thongs. Many years back when we first moved in together, I bought an apartment on a building that had a swimming pool. We started going to the pool every sunday morning to get tanned. then i found out that she had about twenty bikinis but not even one was a thong bikini so i asked her why and she said that she only liked to show her ass when she was getting fucked not to everyone on a public pool.
a few months latter when she was very tanned shenoticed that when she wore low rise jeans and short tops she showed this huge tan lines over the jeans so she started to lower her bikini bottons while taning. then one day while fucking her doggie stile i told her that her ass looked very funny with that big tan line in the middle of her buttcheeks so she got upset and started rolling her bikini bottons, almost like a thong, inside her ass to diminish the tan line.
then I made my master move, we were invited to a pool party and she got upset saying all her bikinis were old and with the colors all faded, so i bought her a new bikini that came with a regular bikini bottom and also a thong. she said she wouldn't wear the thong but thanked me for the new bikini with a blowjob wearing the bikini. when we arived to the party there were about 10 couples invited including us. after the gretings and etc the girls decided to go tanning while me and the other men watched a futbol match. My exwife was the only one of the ten girls who wasn't wearing a thong, she told me that all the other girls made fun of her huge tan lines and recomended her to wear thongs.
then one of the girls asked the others if they mind if she removed her top to avoid tan lines on her tits and they all agreed to do topless,. that was the day my exwife first asked me to get boob implants. five girls had amazing boob implants, four had big natural boobs and my ex her little 30A boobs. when we arrived home she asked me to buy her more bikini thongs and dumped all of her bikinis.
the first times she went to the buildings pool on a thong she was the only girl wearing it but after some time more and more girls started to do it until a time were you could see at any time at least two or three girls wearing thongs on the pool and at least 8 or ten girls on thongs on a saturday or sunday morning