Did you last long, Arvie? I found that my first few times weren't a challenge in terms of not busting early. You can laugh at porn but I think it gave me a certain endurance. Looking back, I am reminded of my days as a youth basketball player. Our coach would make us use a special basketball that was heavier than a regular one, and he'd have us practice shooting three point shots. After shooting with it for ten minutes or so we'd switch back to the regular balls, and realized we could now easily hit the rim. Likewise the grip of my hand prepared me for pussy - nay, it over prepared me for pussy. I realized that most chicks weren't nearly as tight as my hand.
Daps to you Arvie.