[ There is a brief pause in any further action while Naoto tries to figure out how to be less gentle (though his tongue keeps moving thoughtfully during the pause at least) and— and. The fingers of his free hand make more solid contact instead of being feather-light, while he pulls his mouth up the shaft and then down it again, slowly on the way up but faster on the way down...

Then he makes a curious little noise, the closest he can come to asking 'is that better' when his mouth is busy ]