The latest hair trend in China? Used condoms! Condoms are being recycled into hair elastics in Southern China because, well, they're super cheap. And if you thought that was gross, wait till you hear this: Health officials say there is a considerable risk for transmitting bacteria, HPV, or HIV through oral contact (when girls put the elastic in their mouths when gathering their hair for a ponytail) or through open wounds on fingers (from nail biting, paper cuts, etc.). [Inventor Spot]