There is a tiny pause, but only because Lan Wangji is so surprised by the request. Not because it is, as Magnus says, weird, but only because casual physical intimacy of this kind of is so rarely requested of him from anyone but his husband. Sizhui has mostly grown out of it, although not entirely. Lan Wangji hopes he never does entirely.

If it will help Magnus, he will do it. Weirdness is irrelevant. With the hand that isn't holding Magnus', he brushes the hair back from Magnus' forehead and does as he is asked. He is, as with most things, methodical and measured but far from cold about it as he smooths Magnus' hair as gently as he has ever stroked the fur of the Cloud Recesses' many rabbits.