Prepare for the bj finish

Hi ladies! I loveee giving my man blow jobs, but I’m just so scared for him to cum in my mouth. He always pulls out. I’m wanting to advance and learn how to manage him finishing in my mouth. What do you ladies do to mentally prepare yourself? Do you have your man eat anything special to make it taste any better? I don’t mind the taste of precum but I’m not sure how full finish would be. I don’t want to be a quitter either ;) no hate please, I’m just wanting to advance and give him the most possible pleasure :)