Don’t tell Bryan Johnson, the tech CEO famously obsessed with not dying, but the key to living longer for men just might be getting your nuts surgically removed. In course of their research, the scientists found that when both females and males have their reproduction curtailed — via contraception or castration, respectively — they tend to live longer than their unaltered peers. Males who have been sterilized before the onset of puberty, on the other hand, seem to live longer because the presence of sex hormones impacts biological aging. “Reported increases in survival in castrated men resemble the effects in other species, whereas survival of women is slightly decreased after permanent surgical sterilization,” the paper reads. More on longevity: Scientists Discover Easy Hack to Live Way Longer