The male Japanese stream frog sports some surprising sumo and wrestling moves. But watch this Prince Charming's way with the ladies. During mating season, he'll clutch a female in a vice-like grip and ride piggyback as she makes her way toward the spawning grounds. But it's no pleasure cruise. The long river route is full of fast-flowing rocky turns and waterfalls. No matter the hazard, he will not let go. But a new threat awaits: the bevy of anxious bachelors who don't accept no for an answer!