soon to be a thing of the past?
http://www.wired.com/magazine/2011/04/ff_vasectomy/2/
"Rather than shutting down sperm production, with the potential side effects that entails, it acts more like a tollbooth on the sperm superhighway. As the negatively charged sperm pass by, they are essentially zapped by the positive charge of the SMA polymer. So a RISUG-injected man will still ejaculate millions of sperm, but most will be dead: tails snapped off, cell membranes ruptured."
The Genghis Khan in me disapproves!
More men need to consider the most effective contraceptive: http://www.smbc-comics.com/comics/20060901.gif
Also where the hell are my concubines? And my conquered lands?
O wait, gotta play some more TF2 LOLOLOL