They've never really been shy about touching one another. Liam was only twelve the first time he and Break and Sharon had accidentally fallen asleep together one rainy, boring day; once Break carried him around on his back for a week after he'd hurt his ankle falling out of a tree, and then they'd got into the habit of inflicting all manner of pokings and proddings on each other just to be annoying. The very first real interaction they ever had involved Liam reaching out to grab at Break's wrist and pull his hand away from his missing eye.
No, some level of physical contact has been normal for them for years and years and years, so they never have to go through that nonsense phase some couples endure where every accidental brush of the fingers results in a stammer and a blush. All the same, after Liam kisses him and Break accepts it happily, it's like a door has opened and they've stepped through it. Suddenly, though neither of them ever says so aloud, it's okay for Break to take a seat on Liam's lap instead of on his desk when he feels like being bothersome, and it's okay that sometimes when he does that Liam will actually stop working and just hold him close, and when Liam discovers that kissing Break is an excellent way to shut him up, that's okay too.
The thoughtless touches are the best ones.
One day, before he even realizes he has the impulse to do it, Liam reaches out and pushes Break's hair aside from his missing eye. Break glances up out of habit, a little surprised. He can't see it, but Liam is wearing his quiet expression.
"I've never actually seen all of your face at once," Liam explains when his thoughts catch up to his hand and he notices the question in Break's features. "The first time, there was blood, here." He lets his palm rest completely against Break's skin, his thumb warm against his cheekbone underneath the hollow eyelid. "When the blood was gone, bandages. And you started styling your hair like this before the bandages were off."
"And now, your hand is there," Break points out gently.
Liam smiles a little. "So it is." He shifts it so all it's doing is holding the hair away. Break lets both eyelids fall shut.