The bellboy and the playgirls (1962, usa/west germany, dir francis ford coppola/fritz umgelter)

The bellboy aspires to be a private eye and is reading a book to learn the trade the 'suspicious' activities of women in the hotel give him a chance to practice his skills surprise! they are representatives of a lingerie manufacturer to investigate further, he poses as a potential buyer, and the women take turns modeling their wares this includes demonstrations of how easily the garments come off making this a film destined for softcore movie palaces in the '60s