A previous gf would do this often. A good paddling, followed by a milking. She had grown up on a dairy farm, so I knew she would be an expert at milking. She would yank my cock from behind, pulling on it and stretching it. Then with her fingers she would "milk the cow". When she whispered "time to empty those balls", I would lose it. I would be crying and begging her to finish me off. Which she always did.
It is lovely.. That would so work for me. I think I would errantly cum faster, because I like the spanking so much.. I guess that would result in another spanking for cuming too quick...OK with that.