The problem is that most women don't want much else from a one-trick pony that can't hold a job or drive a car legally. The one trick is nice, but great sex isn't all there is to life, mate.
I assure you she was not the only one loving the feeling of his potent sperm blasting against her cervix. It feels out of this world to the sperm pumper too. That's especially true is she's hard milking and cumming on his pulsing cock to help him deliver.