I just finished a book over the weekend called the Elusive Orgasm...and it makes the same suggestion as you Rhapsody that it may be a mental block for me....
It also lines out a 4 month step by step "program" to retrain my mind and body....I think I'm going to give it a try, I'm scared it won't work but I'm trying to stay positive...I mean what have I got to lose? it also says that the negative thinking that I "can't" will keep me from it as well. we'll see how it goes.