2) A little dull supposedly because of being rural; built off of the stereotypes that rural people are both stupid and fed mainly corn.
Person 2: Yep, prob'ly already startin' to turn into cornfed idiots.
a.k.a. naturally large breasts, or a naturally large penis
Yeah, she must've been corn-fed
2. Holy shit, this guy's dick is huge!
Yup, he's corn fed