Saving your life in the bedroom and in the bush (steady).
Apart from the whole waterproof aspect of them and their ability to hold liquids, it turns out that condoms can also make handy medical gloves in an emergency, tourniquets, signalling devices and even as part of a slingshot.
So really, you should carry some at all times and they're the ultimate thing you should try and sneak into a Hunger Games style scenario if you're ever involved in one. Hey, it's better to be safe than sorry.
Via YouTube