[Well, this whole thing started with physical communication - way, way back on their first in-person, mistletoe bot-enhanced encounter - and if Jack had had his way it would probably have remained their main method of communication! Though it's almost certainly a good thing that Spike didn't go along with that. They did need a fair bit of actual talking, after all, to get to where they are now.
And where they are now is fantastic, all the more so for being relatively unexpected. So much so that it's a moment before he realises Spike has frozen in place, his eyes squeezed shut and a look of fierce concentration on his demon-featured face.
He sinks back gently onto the table and peers up at Spike, the hand that had been wrapped around his head relaxing to just stroke a bit, soothingly.]</small>