My experience:
As I became more familiar with what it took to hold back/clamp down the urine, I was able to stop almost all episodes of it. You gotta have time for the brain and the nerves, along with the battered bladder to figure out how to work together again. Continence is a good start, but you will really learn the feelings and how to control it by being involved in the act of stimulation, orgasm and control. Whether you learn this by yourself, with help from the wife or during full intercourse, it will be a learning process to figure it out. If it really becomes an issue, then using a condom has been recommended here, as well as using a small sized penis ring to hold the urine back until after sex. All this is dependent on that Viagra working, of course.....
I hope it does right out of the chute....