Why doesn't Donald con vịt, vịt where pants?

This câu hỏi has probably been asked on this club before, but I couldn't find it, so I'm asking it. I think that Donald con vịt, vịt doesn't wear pants because he doesn't want to. My theory is that động vật don't wear clothes to cover themselves up, like humans do, but that they wear them thêm as accessories that are purely optional. What do bạn think?