Lyric discussion by MusikNote 

Cover art for Costume Party lyrics by Two Door Cinema Club

i agree with you Sunshineshine

I also think it could be someone talking to a younger person that's worried about them, maybe a younger sibling? I love the way he sings it in this song, it's not very energetic but really reassuring and optimistic, giving the impression that he has it all figured out already.

The best part to me, is the line "It's what you get when you try to educate a black sheep/You can't, you won't, you never will"