I saw this a few days ago, and it stinks to high heaven. Folks have been working on this problem for decades and I think it is very unlikely a carpenter with no medical training managed to outwit them all.
Coverage I saw elsewhere at least mentioned that it’s hardly an “instant off” – after closing the valve, it may take three months before sperm stop showing up (not so much unlike a typical vasectomy, I understand). With that kind of wait time, I would think it would be preferable to have an appointment with one’s urologist to have the valve opened when desired.
