I like to think that humming old tunes into Ianto’s ear before he falls asleep is something Jack would do. Or singing/humming the open theme from out dated alien sitcoms. And Ianto doesn’t know what it means most of the time but those tunes are catchy so he finds himself humming them while making coffee.
Headcanon
Jack makes it a habit to take ianto’s phone and change his background to a different picture of him (meaning Jack) everyday. Ianto hates it and changes his passcode but Jack always guesses it
I randomly gave myself a really sad feel by listening to “On My Own” and thinking about Janto
