I once paid for me and missus to have a snorkel session in the black sea, we went off with our instructors, male and female to suit, wearing wetsuits , I looked like only gay in village , anyways getting into it guys showing me urchins and grass fish etc came up for air and spotted missus couldn't sink , the woman was all but drowning her trying to force her under the water , anyway she survived , but was amusing at the time , I was unaware of her fears of water at that time....£20 , tried selling me a DVD of it thought better than to get it , got it on missus' hard drive for life....