Sex... 13 Beaufort (1971)

Blind with lust and the irresistible urge to have sex, Martha, the virginal daughter of grizzled lighthouse keeper Nikolas, can only pray for a miracle. Instead, she finds herself trapped in an isolated, barren rock in the Aegean. However, when brutal fisherman Vagos unexpectedly sets foot on the sun-bleached islet, the tide turns. And then, three sexually liberated British yachtswomen enter the equation, ushering in a period of unbridled desire, sexual exploration, and intrigue. Now, raw passion governs the prisoners of love, body and soul. Can inexperienced Martha survive the all-consuming complications of blind jealousy?