I've heard of people trying a high proof alcohol and injecting it directly into their testicles to cause a sterile necrosis.
I did 20 shots over the course of a month 3 mils, 10 shots to each side using standard 80 proof vodka (It was what I could access at the time......poverty)
They shrunk way down and I feminized much more, but I recovered from it.....I was pretty baffled. Admittedly I should've gotten everclear.
I did all that AFTER my son was born.........and four and a half years later he has a seven month old sister.....
He may not have if I had used proper everclear...........(but we're glad she's around)
my testicles still have some perma damage, but I'm also still kicking out a reasonable amount of T.....I always have healed remarkably well.