In the The Nutty Professor, filmmakers chose to make the main protagonist (Sherman Klump) morbidly obese as his main concern in his life. The film is a remake of the 1963 film of the same name in which the protagonist (Julius Kelp) has the main problem of acting and looking socially awkward, but is not overweight. Actually, Julius visits the gym to bulk up and gain weight.
Sherman Klump appears to be extremely shy and socially awkward in his own right without being overweight. Both protagonists transform into the same alter-ego named Buddy Love who acts pretty much the same way in both films after drinking a potion.
Is there any explanation from filmmakers on why they chose to add the problem of obesity to an already socially awkward and shy Sherman Klump?