married, I was in the same situation as your bhai before. Now I have almost cured it myself. The problem is purely psychological, bhakbhakaunu is not a problem at first, it is a symptom of some other sub-conscious problems. Only your bhai himself can solve it. He has to understand his situation. Yes I went to speech therapy, and that gave me new insight of this problem. In short I will say try to socialize him as much as you can, let him not worry about his bhakbhakaune problem, just dont care and talk to as many people as possible. It is hard to explain as I am not a psychologist. Hope I did not confuse you more !