I love adventure time :3 But it isn't really an anime, my favorite chapter is Betty. ;w; Anyways, I need to post a theory cause I want to tell somebody, xD
Well, in the chapter Simon and Marcy there's a pink mutant that gives Simon soup for Marceline, well that mutant is probably Princess Bubblegum, so Simon (Ice King) loves her for doing that? :3
We stopped searching for monsters under our beds, when we realized they were inside us.