What is first thong bikini?

The first thong bikini was invented by Brazilian designer Rose de Primo in 1974. The thong bikini consisted of a skimpy bikini bottom that exposed the wearer's buttocks. It caused controversy and was initially banned in some countries due to its revealing nature. However, it soon became popular among beachgoers and sunbathers, and it has since become a staple of beach fashion. The thong bikini has been modified over the years with different materials, designs, and colors but still remains a popular choice for many women.