You may want your opponent to think that groin kick is the only thing that you know how to do. The moment that he pays attention on your groin kick, he may forget your punch. I may talk about sport fight here. You only have 3 minutes to win a fight and you need a "plan".But you are saying that if he blocks or moves back, throw 3 groin kicks, one after the other... correct? Then follow with a 4th to use as a set up?