There are a number of different phenomenon that appear to be correlated with pornography use. Delayed ejaculation, difficulty reaching climax and our reward circuitry getting messed up could all be caused by watching porn. We're also shaping our expectations in sort of an unhealthy way when it comes to real life sex. And so if you're not able to climax with a partner, or if your partner feels kind of, you know, unloved, or you have difficulties or has concerns about your ponography use, that can lead to problems.