Marcus has a scrotal sac the size of a small cantaloupe. He’s 57, he’s been at this for over thirty years, and he has absolutely no plans to stop. The practice is called ballmaxxing, and it’s exactly what it sounds like: inflating the scrotum with fluid until it reaches sizes that have no business existing on a human body. The most common method involves running saline through an IV line into the scrotal sac via a butterfly needle inserted where the base of the penis meets the scrotum. A liter of saline inflates things for 24 to 42 hours. More fluid means longer effects. Marcus told Men’s Health he’s graduated to injecting Surgilube, a water-soluble surgical lubricant, and has reportedly stretched his sac to 14.5 inches. “I’m astonished at how flexible the testicles are,” he says. “They just expand.” Videos by VICE On the subreddit r/salineinflation , which has over 8,700 followers, this is considered aspirational content.…