I have been wondering about this for a while. My wife video chats all the time now but she was a bit hesitant at first.
Is it a hair and makeup thing? (I know that was very sexist but you tell me)
Is it the fear of speaking to somebody creepy? (you can always disconnect and block them)
Do they really have nothing to say? (hehe, I will believe that when I see it)
Maybe they are just shy.