Quark is bisexual and biromantic but it takes him years to acknowledge the second one because among male Ferengi, bisexuality is totally normal but sex is traditionally a boss/employee power play thing, and if you fall in love with someone in that cultural context they are going to take advantage of you. (And Quark lives in constant fear of people finding out that he’s as much of a romantic as Rom.) He was interested in Pel before learning she was crossdressing, but it scared him because he had been successfully ignoring that aspect of his desire for years. And his interest in Nilva in Profit and Lace (ugh) had nothing to do with “female hormones”. Don’t worry, he comes to terms with it eventually. Can’t spend too much time off of Ferenginar without realizing that there are a lot of other ways to do relationships.