Just relax. If you keep on putting so much pressure to perform god like sex, Im sure you will only disappoint yourself in the end. Everyone has different limit. But one thing for sure, is that practice make perfect. The more you do, the more you understand your limit and endurance. Then you will adjust to it and making yourself last longer before you knew it. Its like a quest to find pleasure. If you use those product that ensure lasting performance, you are not enjoying it... you just become another sex slave nia... work so hard for what sia...