At the end of an act of anal sex, when a penis is removed from an asshole, sometimes
the penis is covered with shit and with kernels of undigested corn. This
phenomena, as well as the penis in this situation, are known as "corn dick". Corn, if not chewed up, is not easily digested and so appears as whole kernals in feces, which then sticks to the penis in anal sex. Corn dick can
generally be prevented with enemas.