It's entirely out of affection that Viktor is cuddled tightly against K's side. The mirrored affection on both sides allows him to filter Viktor's other emotions, for which Viktor is endlessly grateful. As such, there isn't much in the bond right now beyond affection.

The soft kind of warmth that would usually be in addition to another stronger kind of emotion. But Viktor wasn't kidding about feeling overwhelmed. The warm feeling of affection was so strong, it was bordering on adoration. Viktor himself may have a fear of being still merged with the hex core, but since it cannot fake human emotion, this would be a direct denial of it still having influence over Viktor's mind. Viktor's metal thumb is feathered back and forth underneath K's hand right now.

"For caring this much? Hasn't anyone asked to learn how you like to be touched before? And as I understand it, henna is a temporary mark at best, so I am not sure that it would be what we're looking for in this instance."