A Visit with the Pleasure Goddess of Rixx was an erotic holosuite program owned by Nog, who claimed the program was his personal favorite. When Nog left to attend Starfleet Academy, in following with Ferengi tradition he auctioned off his most cherished possessions; the holo-program was one of them.
At first Nog tried to sell the program to Julian Bashir, but the doctor demurred. However, Jadzia Dax bought the program for ten strips of latinum and gave it to Bashir as a gift. (DS9: "Little Green Men")