Is my boyfriends grequent urination something serious or him being paranoid?

Patient: My boyfriend has been frequently urinating about every 5 minutes or so for the past few hours. he hasnt drank to much today besides a liter of gatorade and 2 liters of coke which he drank at 3 am and the gatorade a few hours ago. he has drank apple juice, water, milk, and soda the past few days. his urine is clear and shows no sign of a UTI or dehydration… what could it be? or is he just paranoid?!?

Doctor: