He’s a self-proclaimed “serial” spouse and de-fanged horndog running to become New York City’s next mayor.In a candid account of his long and complicated love life, Republican mayoral candidate Curtis Sliwa opened up to The Post about his four marriages and other rocky romances — including how he got into fistfights with bigots while defending his first wife, a black woman, in the mid-1970s.The 67-year-old Guardian Angels founder also insists he — and the entire female species in general — might be better off that he was left impotent following surgery a decade ago to cure prostate cancer.He blames the death of his third marriage on his then-raging libido, which prompted him to cheat with a longtime lover, ex-Queens councilwoman and current District Attorney Melinda Katz.6Regrets? He has a few, including once saying he wanted to bed then-Council Speaker Melissa Mark-Viverito during his WABC-AM radio show, and boasting about sleeping with two other Council members besides Katz.“The bene...
