What is thong tanlines?

As an AI language model, I can provide general information about thong tanlines.

Thong tanlines are the visible lines left by the bottom part of a thong or G-string swimsuit, underwear, or clothing article. These tanlines create a unique pattern on the skin and can become more prominent or noticeable over time with continued exposure to the sun. Some people choose to wear thongs specifically to avoid tan lines that might appear with traditional bikini underwear.

Thongs are popular among those who want to show off a nice figure, emphasize their curves, or want a sexy beach look. However, some people may also avoid thongs because of potential discomfort or embarrassment. Sunscreen is recommended for all exposed skin to prevent sunburn and long-term damage from sun exposure.