His fingers massage around the opening for a moment before he slides in a finger. He doesn't take as much care as before, not out of a lack of concern for Charlie but because this called for something a little rougher. Regardless of that, he takes his time with the first finger before slipping the second in.

And the third.

After the preparation is done, he uses the rest on himself, stroking a couple of times before planting his feet on the mat and grinning at Charlie. One arm goes under Charlie's arms and the other positions him before he looks carefully at Charlie.