BMO in “The More You Moe, the Moe You Know”

Air? Are you there, Air? It's me, BMO. [walks to a snow-covered rock and sits down] I know it's been a long time since we talked. Sorry about that. But, well... maybe if you don't want to talk, you could just listen. Moe told me if I do this thing, I'll be all grown up. And that sounds cool, I guess. Like... [see a much taller BMO in his car] If I was grown, then I could drive to the playground all by myself. And... I could buy my own pacifiers at the store if I was grown. [tall BMO struggles to open the door] But then... if I change, will Finn and Jake still love me? [see smeared versions of Finn and Jake] Will I still love them? Moe changed into a new body... and he's still the same, I guess, sorta. But does growing up just change your body? Or... also your soul? [sighs] Maybe I could just stay the same forever.