Jan Vinzez Karuse has developed something he thought every man would love: the spray-on condom. He began testing his prototype — which consists of a tube that fits over the penis and sprays liquid latex from all directions — last year. According to Karuse, the spray-on condom has a lot of benefits in concept: it fits better, making it safer and more natural-feeling. The testing, however, revealed men's anxieties: some were afraid to use the tube, some thought the hissing sound that the tube emits would be a mood-killer, and (perhaps the most serious road block to marketability) some felt it took too long to dry (2 to 3 minutes).[Time, image via Condomunity.]