We read Guess How Much I Love You to DD (17 months) nearly every night as her bedtime story. Her and OH say 'I love you to the moon and back' to each other (well she says a few of the words and snuggles him) and it absolutely melts me. I got him a little key ring with it on for Father Day from her, engraved with their initials because it means something special to them. He loved it.
But I also agree that Daddy Nutbrown Hare is a bit of a bloody show off, always going one better and if OH posted something like that about me on social media I'd cringe. He just wouldn't! He tells me he loves me, face to face!