As sperm swim they transform chemical energy into motion, the way a car’s engine uses gas to propel you down the road. Like that engine, the process is complicated—if just one part stops working, the whole system can grind to a halt. This idea might lead to a contraceptive for men that’s reversible.
Technology moves forward in leaps and bounds, but some designs never change. Which is why thousands of men embarrass themselves on a daily basis as they struggle to open condom packaging. That's why these one-handed wrappers need to exist.
If you rely on the female contraceptive pill to avoid having babies, you might want to check the packet: Pfizer just recalled a million packs because a fault means they could increase the chances of getting pregnant. Deep breaths: it'll probably be fine.