Madness lies in that direction and Midnight's wary of going too far down that path. Instead he'll focus on Grey's back, focusing on the tattooed flesh to deliberately not think about the implications of that statement.

But then his traitor mouth is asking, "And... how many of those... 'moments' have you had, since... embarking on this quest...?"

I.e. how many people have you banged since your missus, sir?