Island of Desire (aka Saturday Island)

Shipwrecked on an uninhabited South Seas atoll, a Canadian nurse (Linda Darnell) and a young Marine (Tab Hunter) initially clash, but as the weeks turn into months, begin to see each other through different eyes and give in to their natural impulses. But when an RAF flyer (Donald Gray) crashes on the island, the tropical love story is complicated by that familiar bit of romantic geometry, the Eternal Triangle.