My boyfriend of one year was a virgin when I met him. It was no shock because we are both young. For this reason I understand being timid in the bedroom -- new experiences, high expectations, etc. However, after a year he has not once performed oral sex for me, whereas I have done so many times for him. I have made it clear to him that I understand why he hasn't, but also that it bothers me that he hasn't even tried. The fact that he is avoiding my intimate parts makes me feel like they are something to avoid -- I have the impression that he is a little afraid.
Is there any man or woman who could explain to me why he isn't performing oral sex? (besides things involving never having done it before) And/or how I could reassure him that there is nothing to be afraid of?
On the other hand, I don't want to pressure him into doing it, because for me, it has to come from his own desire.

thanks