Orphan's Cereal Dilemma

Alright, Destiny, you little smoothbrain, let's break this down. You see, orphans don't have parents, particularly, in this case, a dad. The joke plays on the stereotype of a dad going out to get milk and never returning. So, the orphan eats cereal with water because they can't get milk, since their dad is gone. It's a sad, sad situation, and a dark joke.