The ass is worn down, scraped, sandpapered, smooth, hard, bright as a billiard ball or the skull of a leper.

她们的屁股磨光了、擦破了、用沙纸打光了，光滑、结实、鲜艳得像一只台球或一个麻风病人的脑袋。

The ass is worn down, scraped, sandpapered , smooth, hard, bright as a billiard ball or the skull of a leper.

她们的屁股磨光了、擦破了、用沙纸打光了，光滑、结实、鲜艳得像一只台球或一个麻风病人的脑袋。