Love in Paradise (1986)

A group of tourists go into the desert and their Land Rover breaks down (the driver wrecks while getting a blow job lol). Some go off for help leaving Victoria reading a book (Lawrence of Arabia) and day dreaming about wandering into the desert and being rescued by a sheikh who takes her to his palace in a spectacular oasis where she has sex with Princess Laeda. Meanwhile the other tourists return to the jeep at different times and have sex. Then they go to look for Victoria, find the oasis and all have an orgy by the swimming pool.