Sex in relationship

It has become an accepted norm that good sexual performance in a relationship is vital for a lasting relationship. I have no founded evidence on that matter. However, my view on good sexual performance is positive. I think it's important for anyone who engage in sex to ejaculate after more than ten minutes.
Doing so requires one to focus on long lasting erection, body performance other than ejaculation. It is important to concentrate for more than ten minutes if one is to have long lasting erection. Being mentally strong when having sex could make the intercourse long lasting.
I am not impressed by my recent sexual performance. My wish has been to make a women scream and feel the pleasure of having sex. I wish to improve this performance by concentrating longer, having my mind on long lasting performance. I want to be able to ejaculate after more than ten minutes. I want my to drown in remaining erect for longer. I want my mind to be strong to sustain my body for longer. I want to keep my body strong.
I want to believe that long lasting sex is the best sex. I want to make my body to retain its stamina for more than ten minutes while having sex.