Most birth control options tend to target women which is scary because they can't be trusted. Just kidding about that last part of course. Seems a tad unfair doesn't it.
Things may be changing, as a new scientist in India has created an injection called RISUG (Reversible inhibition of sperm under guidance). The cool part is that two tiny injections are 100% effective at preventing pregnancy for a minimum of 10 years. This injection can be reversed at any time as
well. Ok, now the bad part, those two injections are into your scrotum, ouch.
This male contraception works by injecting a positively charged polymer into the tube that sperm passes through on the way out of your testicles. This polymer essentially zaps the sperm on it's way out killing it.