I would advise to stop giving too much hope. If the recession continues, he will blame himself for not having done anything sooner. He's clearly a pattern of baldness, especially at 23! It's so young to have a mature hairline like this. I don't know anyone in a case like this. Baldness does not depend only on parents, I have bald friends whose parents and grandparents are all norwood 2. I would advise you to start a light treatment like Zix to limit the damage, and if in a few months it continues to back down accept it or start a stronger regimen!