It's Hot On Sin Island (1964)
In a desperate need to raise some cash to keep their yacht, two men run a charter cruise, and their passenger list includes five pretty schoolteachers. It's anchors aweigh--and clothes, too--as our two sailors are dazzled by the purveyors of reading, writing, and nudity. Pauly Dash and Dick Lynn star. 60 min. Soundtrack: English.