Not to put too fine a point on it, but: blunt force impact to the dick and balls hurts.
Nobody likes it, and those who go forth smashing are met with scorn and condemnation. MLB catchers risk penile harm every day, and sometimes they get one in the down-belows, like Cubs catcher Willson Contreras did this afternoon. Contreras immediately sprung up and put on a little one-man play of pain, hopping around the infield, desperately trying to overcome the hurt.
(Mobile readers can check it out here)
Does jumping around and trying to run it out help? Probably!