Just read this, hilarious!
I think Raymond (welcome back by the way - I was asking after you a few weeks ago, wondering where you had gone. Might fire you a trust message regarding a trip to Hong Kong in the coming days!) is correct. There's obviously something in his culture which makes him feel that he needs to big himself up all the time.
I have an idea why he is like this. At work we have a wide circle of colleagues from all kind of backgrounds. One of which are Sikh and they explained to me their culture. Long story short, the boys in the family are treated like a prince. It would explains a lot.