Although it's not much of a reaction, seeing Itto close his eyes after his horn is touched is something Sizhui's observant of. With the opposite hand, he reaches and touches the horn on that side too, lingering longer near its base, the fingers in Itto's hair staying entwined for now. They needn't rush this or anything, even if Sizhui can feel himself growing harder with want (and, in the back of his mind, a need he can't explain currently), but he'll go at whatever pace the older man sets.

Sizhui had been trying to remain mostly levelheaded throughout this experience, yet after an utterance like ‘Forever,’ how is he supposed to not be a little sheepish? The tips of his ears pinken, he opens his mouth to repeat the word, only to be cut off whenever Itto tugs him down, their eyes meet in passing, and Sizhui holds there until Itto leans into his neck instead. His breath hitches at the tiny bite, he blinks rapidly to clear the stars in his vision that it'd caused, then Itto's kneeling again, going on to say he'll handle it all, which has Sizhui's expression creasing faintly. “No,” he declines abruptly, his hands gripping tighter a moment before he shakes his head, loosens his hold and continues, broken at first but still earnest, “W-What I meant was, uhm, I want to... participate as well.” Where's the fun in letting someone else do all the work? (Or ‘work’ in just the preparation sense.)