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Okay, but what if the forehead touch has been a normal thing for them once? Like, maybe it had tentatively started at or just before the Innovators Competition to help calm each other's nerves. One would see the other being nervous and give a little 'hey' and then a small neck touch and then casually lean in to touch foreheads and just breathe until they're better. Like, working on the gates (especially the gates), gloves, and laser would have been so stressful. But then the new council has pulled them apart, but at the very end when they had to face down the arcane together the forehead touch had been automatic for them...