Science Invented A Birth Control Shot For Men, So Why Does Nobody Seem To Care? - Healthy Living on Shine
(NSFW video of procedure)
The Revolutionary New Birth Control Method for Men | Magazine
This is an update to this topic, it looks like it might hold some promise.
Too bad he sold the International rights to it. What would cost $10 in India will probably cost $1000 in the US now...
The only thing is they said it is reversible, but has it been tested yet? Do you need to get that section of Vas Deferens tubing removed and stitched back together again? And I guess there isn't much chance of the gel being expelled, but I would be concerned about it.