Something called the "coefficient of restitution," or COR, measures how well an object will bounce off a surface. It's measured on a scale of 0 to 1 . . . if something gets a "1," it means an object will bounce off it perfectly.
Want a butt that's so tight you can bounce a quarter off it?

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By Majic 95.5
Feb 07, 2020, 08:28 AM CT




