Lucius and Narcissa I have to admit it's pretty cute....
Newtina tumblr post
Actually, the song is by Neil Hannon, but it's great nonetheless!
Honestly, by now, I'm 87.65% sure that the only reason the Newt and Tina ever told each other how they felt is because of Queenie. And maybe she has to stand there reading each other's minds and by like a translator.