Red Dragonfly

On “Chuon Chuon Ot,” Ngoc Khue starts off with “Chuon Chuon Ot, trua he nong buc / Bat dem can run, tap boi,” which refers to the infamous saying: taking a red dragonfly and let her bite your bellybutton to learn to swim. Does anyone have any idea behind this weird folk tale? Of course, it is untrue because my uncle told me he allowed the dragonfly to bite him a numerous time and he still couldn’t float. I am interested to know because the story is cute.