Unfortunately,
there's a dark backstory to the guy in this photo. This tattooed rump belongs to "Master Dylan" - aka Noodles and Beef - a former techie who lived in San Francisco and then later moved to Seattle around 205-17. He augmented his scrotum with silicone, and he (
allegedly) coerced his fellow gay housemates to do the same.
Dylan (
allegedly) injected the scrotum his gay Australian roommate,
Jack i.e. "Tank", with silicone as well. A few days later, Jake fell ill and died from an embolism resulting from dislodged silicone which clogged his circulatory system or caused an blood infection. A lot of this played out before a predominantly gay audience on
Tumblr at the time because silicone injection enthusiasts were following Noodles and Beef and his gang. Jack's parents in Australia sued Dylan for wrongful death in a civil suit.
This story is a cautionary tale about the risks associated with do-it-yourself genital modification. I won't judge the use of silicone to enhance one's balls, but if you followed Dylan on Tumblr back in the day, he behaved like a fetishist, cult leader and was psychologically abusive.