I am sitting on your bed, my arms around my knees, keeping very still and very quiet because you are being photographed. In nothing but an unbuttoned shirt, you stand quite naturally in the light of the window. Your body is toned, slim, beautiful. 

There is no sound except for the camera's shutter, the photographer's murmurs of appreciation and my own pounding heart.

You are almost erect now. The curve is evident, as is the shape of the tip. And now you are properly hard, fully erect. The photographer smiles. Then she nods, and you begin.

I am already there!