I'm gonna say it again, but there's not other Dabi ship doing it like Shigadabi.
Any other ship, Dabi has to explain himself, his past and trauma, and he's not even sure the other person would get him. But not Tomura.
Dabi doesn't have to explain how is like being around Ujiko and AFO, or how it feels to go through a surgery that changes your entire body, or how it feels knowing he almost ended up as a nomu, or how it was to live in a house with an abusive father who thought he was doing what was right and an abused mom who was trying to survive each day.
Dabi doesn't have to talk about living alone on the streets, how it is to remember your siblings, how it was to be awake while your whole word fell apart and your body slowly betrayed you, the quirk you was so waiting making you a monster and not a hero.
He doesn't have to explain to Tomura how it feels to deal with chronic pain, to be unable to eat without feeling nauseous sometimes, how the hatred and rage and bitterness and loneliness can destroy you, or how can you stay trapped in a memory of your childhood, or how it's like to lose years of your life to amnesia.
Getting your hair white, getting the scars, nobody listens to you, nobody believes in your abuse, seeing the person who abused you the most or the hero who totally failed you being celebrate on tv, knowing you can't be normal, being stripped out of your identity, believing you deserve what's coming and you deserve to suffer and you're a monster so why shouldn't they perish with you.
The reason why Shigadabi slaps, it's because no other ship clicks as hard in recognition. What you lived, I've lived. What you've suffered, I've suffered. We are the two lone survivors, we can't explain, we could never explain, but I don't have to even try to explain it to you.
And it makes me go feral.