Investor Kevin O'Leary slammed financial guru Dave Ramsey's warnings against prenups, insisting that women should protect their financial independence before marriage as a standard practice, not a warning sign. O'Leary Calls Dave Ramsey's Advice Against Prenups ‘Moronic‘ O'Leary, best known as a Shark Tank judge, criticized Ramsey's long-standing advice against prenups in a conversation with Moneywise last week, calling it "moronic" and "the stupidest idea I've ever heard." Ramsey has warned that prenups ...