From a medical view, breathing ketopromos deeply during sex helps a lot in suppressing your "fight or flight" response. This is one of the main culprits that cause premature ejaculation. When you are calm and relaxed during sex, you will be able to last longer while thrusting. 3.) Focus On Your Woman's Pleasure! By now you should have noticed that preventing premature ejaculation has to do with you stopping yourself from worrying about your ketohour performance and whether.