The actual history of the place is pretty wonderful. Shampoo Island is here:
It's in a river, just off the banks of Mawlamyine. In ancient times, the Royal family of Myanmar/Burma would visit Shampoo Island just once a year and get their hair washed in the river waters. Then someone came with a bucket of shampoo dotted with flower petals, and began massaging everything until it's a thick lather.
I would love to visit this place one day because it seems so cool!.