Here is a little info on the G-string. A G-string which has been shortened from gee-string or gee string, is a type of underwear, a narrow piece of cloth, leather, or plastic that covers or holds the genitals, passes between the buttocks, and is attached to a band around the hips, worn as swimwear or underwear by both men and women.

These two terms G-string and thong are often used interchangeably. They can refer to distinct pieces of clothing: The primary difference between the two garments is that a g-string has less material between the legs and buttocks, hence a string-like appearance. Variants of the G-string include the V-string,with a triangle "V" of cloth at the top of the rear, and the T-string, where a single string passes around the waist and between the legs, forming a T between the buttocks.