This one had me going for a while before I figured out it was a joke. The EETimes reports
on a small Belgian company called Prophy-Lectric that has developed a cellphone add-on, dubbed the Nippit 3000. This remarkable device "projects a high-intensity ultra-sonic electromagnetic 'sound cone' that is inaudible to the human ear but fatal to any sperm cell within a range of six meters, or about 18 feet." In other words, just place it next to the bed during moments of intimacy, and that's all the birth control you need. As an added benefit, the high-pitched sound also keeps the dog away. I've noticed that quite a few websites have linked to this story
without any acknowledgment (or apparent recognition) that it's a joke.