It’s interesting, since I am one of the more outgoing girls, and yes, I can be quite talkative. However I do find myself drawn to more quieter guys. I find that there is a lot going on beneath the surface and if we give them enough time and respect, it will come out. I also enjoy having one on one conversations more than group talk and I feel that I like bringing out those who may be more quiet and hear their original thoughts and what they have to say. They are inclined to be modest and unassuming and I appreciate people who are great listeners as well.
However if this is someone who really cannot say a word in a conversation or respond at all, I would say that it may be a good idea for him to speak to someone and work on developing himself in that area. There can be a variety of factors causing this which can be worked through.