For decades, Steve-O has made a career out of capitalizing on self-inflicted pain, but the "Jackass" star says his days of taking kicks to the crotch are numbered.
"The concern is testicular cancer," he told TooFab during a recent interview. "The more nut trauma you have, the more you're disposed to cancer. So I've been really pretty careful over the last so many years to be highly selective [of who I let kick me in the crotch]. It's gotta count."
"When Sansa from 'Game of Thrones' was down, I was like, 'Okay, Sansa, I would be honored if you kicked me in the nuts,'" he said.
Steve-O spent years on tour, traveling the world and kicking random dudes in the crotch for sheer entertainment. Despite the fact that they were all consenting adults, he said he began to feel guilty after getting clean and sober in March 2008.
"I would kick them in the balls, but I wouldn't let them kick me back," he said. "So when I got sober, I felt very guilty about that. That was my first amends in recovery! I went to go meet up with [Johnny] Knoxville, and I got totally naked. He kicked me so hard. It really got me started on my recovery."
Sitting next to Steve-O was Sam Macaroni -- his longtime friend and the creator of "Headset Hotshots," a virtual-reality miniseries featuring "Jackass"-style stunts based on first-time VR fail experiences. The series, which airs on YouTube, stars Steve-O.
Following Steve-O's cringe-worthy tale about Knoxville, Sam asked, "Did you really need the vasectomy? Because, I think at this point, you're probably dead down there."
Steve-O laughed and replied, "People ask me a lot, 'Can you have kids? Because you've been kicked in the nuts so much.' My theory was that, if it doesn't kill you, it makes you stronger."
"Before I got my vasectomy, I went to a fertility clinic to get my sperm count," he continued. "So I rubbed one out, and they put it under the microscope, and they told me that the average man has 20 to 30 million sperm per milliliter of goo. And I clocked in at 51 million! So if it doesn't kill you, it makes you stronger -- and I'm really good at pulling out."