The Christmas Surprise

Finally Christmas... My girlfriend is totally excited about what I'm going to give her. This year, not entirely unselfishly, I have thought of something very special. When I call the surprise into the room, she beams with joy because suddenly Father Christmas is standing in front of her. He doesn't have any presents with him, but he does have his big rod, which he then uses to give us a good tug in turn. I really managed to pull off this surprise