I agree he wanted to be the on to keep her safe and warm but he couldnt so he allowed Jacob to be the one to do so. It was hard for him to do and you can tell that from the beginning when Jacob even thought of the idea. That scarifice only made him that more noble and more unselfish which I thought was impossible by that time.
I'm not sure what I thought about it, really. On one hand it makes Bella uncomfortable and Edward angry, but on the other hand it probably helps toward Jacob's infatuated love. And, before Breaking Dawn, I have the tendency to feel really sorry for Jacob :(
Thank god he was there! BUT he sure wasn't fighting fair, Edward knew he could not do what was needed and Edward knew that he had to let this happen to save Bella. So hard for Edward to deal with and remain calm, I think thats why he allowed himself to answer Jacobs questions. Distractions remember...Back in Twilight he asked Bella to talk to him so he would not go back and kill those men....same here.....if he was able to contain himself and answer Jacobs questions then maybe he wouldn't leap right there and then and RIP HIS HEAD OFF! What he found was .....he uses this time to really let Jacob in and explain what and why he feels the way he does about Bella and the choices he has made. Edward knows Bella and knows what choice she will make, Edward and Bella are two pieces of a whole. I like it in the end when Edward gets to rub it in a little..."Dosen't even make my top ten"