Karl estimates he and his wife, who is 73, eat all but three of their meals every week at Whataburger. The order is usually the same: a Whataburger with grilled onions and jalapenos for him, a Justaburger with grilled onions for her. Both of them order their buns toasted. Their love affair with the chain began back in 1963, when the couple got their first taste.
