Blue balls (epididymal hypertension): Myths and facts
Owner thought the dog had blue balls............................ : r/VetTech
FACT CHECK: Are 'Blue Balls' a Real Thing?
Pacific Science Center Life Sciences: November 2009
Urban Dictionary on Twitter: "@ashhatesu Blue Balls: the excrutiating pain a man receives when his balls... http://t.co/7BQFUoPPqg http://t.co/XSarLcCjrB" / Twitter
Is Blue Balls a Real Thing? | Man of Many
what does blue balls feel like? cause I think I got it..
Banter Blue Balls' Are the Second-Worst Kind of Blue Balls | GQ