Why are Dolly Parton’s feet so small?

This joke plays on the stereotype that Dolly Parton, the famous country singer known for her talent, flamboyant style, and notably large bust, would cast a shadow large enough to prevent the sun from reaching her feet, thus humorously suggesting that lack of sunlight would somehow inhibit their growth. It’s a light-hearted way to poke fun at her well-known physical attributes without being offensive, as Dolly Parton herself often jokes about her image. The humor lies in the absurdity of the idea that sunlight affects the size of one’s feet and the playful exaggeration of her proportions.