Ice application, over-the-counter painkillers, and masturbation can help speed recovery. "Blue balls" is an informal term used to describe pain in the scrotum ("ball sack") that occurs when there ...

A blue ball is thrown upward with an initial speed of $v_{b0}$, from a height of $y_{b0}$ meters above the ground. $t_r$ seconds after the blue ball is thrown, a red ...