here we have Joey showing off his soaked diapers. How did they get so big? He soaked his diapers relentlessly. With how thirsty these diapers were, it didn't take long before they swelled and ballooned up.
When they were dry they weren't any bigger than any other diaper but now they are big fat baby diapers. Only a true rudderbutt like him could soak them this much. Perhaps he should show them off to his girlfriend.