I got this idea one day. I imagined that when Takato left Guilmon home alone one day he decided to try on Takato's briefs out of curiosity. He loved the warm, cozy feeling he got from wearing them, and hid that pair for safekeeping. Now every time Takato leaves him alone, he puts the briefs on and wears them all day while he lounges around.

F.Y.I. He's watching T.V. right here. The remote sort of got cut off there at the bottom.