Even though the two-piece swimsuit had modest beginnings, it has evolved over time into something much more (or much less, depending on how you look at it). The thong must have been like an atomic bomb going off when it was seen for the first time on a beach. In the picture above, we see several different types of thongs. The model on the left is wearing a string thong while the model on the right is wearing a style of thong gaining popularity recently, the pucker back thong.