I remember eating grapefruit as a kid (not at the same time as corn dogs) and it always involved two things:
Adding sugar to a grapefruit basically turned it into sour, sugary candy fruit. There’s some nutritional value buried under all that sugar, but really, why not just eat something not incredibly sour-tasting that you won’t drown in sugar? And every kid I knew did this–and every parent let them. The Sugar Days, as we called ’em.
We were kind of dumb in the old days. Do people still eat sugar-encrusted grapefruit now? My hunch says…yes. Maybe they use Splenda instead, though. “Just one drop, Jimmy, that’s all you need. Jimmy, don’t squirt the bottle on it!”