Mark Cuban may have a net worth north of $5 billion, but when it came time to split the check with his dad, the math didn't matter. In a 2019 appearance on "The Dan Patrick Show," Cuban shared that his father, Norton Cuban, "did upholstery on cars and I don't think he ever made more than $40,000 in a year." Still, that never stopped him from grabbing the dinner bill—even after his son became one of the richest entrepreneurs in America. "He was dad," Cuban said plainly. "If we went out to dinner, he was pulling out the credit card no matter what. The minute I said, ‘Dad,' he just looked at me with a death stare like, ‘Don't even think that you're going to pay for dinner.'" And he meant it. The billionaire investor admitted it felt "weird" out-earning his father by tens of millions, but the old-school respect never faded. Norton wasn't interested in who had more zeros in their bank account—he was interested in being dad. Cuban's respect for his father runs deep. At 14, he spent time...