Fairly certain I know who you are talking about and while I am not defending his behaviour I will just say that is his personality. Assuming it was who I think then I am guessing he quite likely butchered any explanation he has heard in the past, most of which he got from me (guessing my name may have been one of those he tossed out as well), again, because that is his personality.
To answer your question about co-dom... Give this a listen, it should help you
http://www.blogtalkradio.com/morelia...tic-roundtable