Improve your mental stamina The more pressurized you are to perform well in bed, the sooner you will ejaculate. Being nervous about lasting long is precisely what will make you orgasm quicker. The nervousness gets to your head (literally) and makes you stressed. To escape this uncomfortable and nervous state, your mind starts working towards getting you out of this state as soon as possible i.e. making you orgasm as quickly as possible. Going into sex with a relaxed and confident mindset will have a great impact on your performance. Instead of hiding your concerns from your spouse, talk to them about it and the entire experience will be so much better. Improve your physical stamina You can train your body to do a lot of things, and lasting longer in bed is one of them. Stamina training methods and masturbation can help you improve your performance but I don't recommend matubation b/c it's very addictive.