We didn't invent this. There's hieroglyphics depicting this that date so far back it seems crazy. The Chinese have documented it's use for as far back as they have written documents. It's still popular because it works so well.
wow i have no idea why this is so powerful. just having your head down a bit and water going into yor nostrils??? how come I don't freak out in swimming pools then?
wow i have no idea why this is so powerful. just having your head down a bit and water going into yor nostrils??? how come I don't freak out in swimming pools then?